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Top 10 Best 1120S Software of 2026

Discover the top 10 best 1120S software solutions to streamline tax processes. Explore features, comparisons & tips—find your ideal tool today.

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How We Ranked These Tools

01
Feature Verification

Core product claims cross-referenced against official documentation, changelogs, and independent technical reviews.

02
Multimedia Review Aggregation

Analyzed video reviews and hundreds of written evaluations to capture real-world user experiences with each tool.

03
Synthetic User Modeling

AI persona simulations modeled how different user types would experience each tool across common use cases and workflows.

04
Human Editorial Review

Final rankings reviewed and approved by our editorial team with authority to override AI-generated scores based on domain expertise.

Independent Product Evaluation: rankings reflect verified quality and editorial standards. Read our full methodology →

How Our Scores Work

Scores are calculated across three dimensions: Features (depth and breadth of capabilities verified against official documentation across 12 evaluation criteria), Ease of Use (aggregated sentiment from written and video user reviews, weighted by recency), and Value (pricing relative to feature set and market alternatives). Each dimension is scored 1–10. The Overall score is a weighted composite: Features 40%, Ease of Use 30%, Value 30%.

Quick Overview

  1. 1#1: Lacerte Tax - Professional-grade tax software with robust support for Form 1120-S, including diagnostics, state filings, and e-filing for S Corporations.
  2. 2#2: UltraTax CS - Comprehensive tax preparation platform offering advanced 1120-S handling, multi-state support, and seamless integration for complex S Corp returns.
  3. 3#3: CCH Axcess Tax - Cloud-based tax solution with full Form 1120-S capabilities, workflow automation, and diagnostics tailored for S Corporation filings.
  4. 4#4: Drake Tax - Affordable professional tax software supporting 1120-S with unlimited e-filing, error checks, and K-1 generation for S Corps.
  5. 5#5: ProSeries Professional - User-friendly tax prep software that efficiently handles Form 1120-S for small to mid-sized S Corporations with integrated e-filing.
  6. 6#6: GoSystem Tax RS - Scalable tax preparation tool providing detailed 1120-S support, custom calculations, and multi-user collaboration for S Corps.
  7. 7#7: TaxSlayer Pro - Cost-effective professional software for preparing and e-filing Form 1120-S with strong support for S Corporation schedules and states.
  8. 8#8: ProConnect Tax Online - Cloud-hosted tax software from Intuit with reliable 1120-S functionality, real-time updates, and easy K-1 distribution.
  9. 9#9: TaxAct Professional - Budget-friendly tax prep solution supporting Form 1120-S e-filing, depreciation tools, and S Corp specific optimizations.
  10. 10#10: TurboTax Business - Desktop software for small S Corporations to prepare and print Form 1120-S with guided interviews and K-1 exports.

These tools were chosen based on robust support for Form 1120-S, including e-filing, multi-state capabilities, and diagnostic features, alongside factors like user-friendliness, scalability, and value to align with the diverse needs of tax professionals and S Corporations.

Comparison Table

This comparison table explores key features, usability, and performance of top 1120S software tools including Lacerte Tax, UltraTax CS, CCH Axcess Tax, Drake Tax, ProSeries Professional, and more, providing a clear overview of their strengths. Readers will learn to identify the best fit for their tax preparation needs, with insights into platform compatibility and unique functionalities to streamline 1120S filing.

Professional-grade tax software with robust support for Form 1120-S, including diagnostics, state filings, and e-filing for S Corporations.

Features
9.8/10
Ease
8.7/10
Value
9.2/10

Comprehensive tax preparation platform offering advanced 1120-S handling, multi-state support, and seamless integration for complex S Corp returns.

Features
9.6/10
Ease
8.2/10
Value
8.7/10

Cloud-based tax solution with full Form 1120-S capabilities, workflow automation, and diagnostics tailored for S Corporation filings.

Features
9.1/10
Ease
7.8/10
Value
7.5/10
4Drake Tax logo8.7/10

Affordable professional tax software supporting 1120-S with unlimited e-filing, error checks, and K-1 generation for S Corps.

Features
9.1/10
Ease
8.4/10
Value
9.3/10

User-friendly tax prep software that efficiently handles Form 1120-S for small to mid-sized S Corporations with integrated e-filing.

Features
9.1/10
Ease
8.0/10
Value
8.2/10

Scalable tax preparation tool providing detailed 1120-S support, custom calculations, and multi-user collaboration for S Corps.

Features
9.3/10
Ease
7.4/10
Value
8.1/10

Cost-effective professional software for preparing and e-filing Form 1120-S with strong support for S Corporation schedules and states.

Features
7.5/10
Ease
8.0/10
Value
9.2/10

Cloud-hosted tax software from Intuit with reliable 1120-S functionality, real-time updates, and easy K-1 distribution.

Features
8.5/10
Ease
7.7/10
Value
7.6/10

Budget-friendly tax prep solution supporting Form 1120-S e-filing, depreciation tools, and S Corp specific optimizations.

Features
7.5/10
Ease
8.5/10
Value
9.2/10

Desktop software for small S Corporations to prepare and print Form 1120-S with guided interviews and K-1 exports.

Features
7.8/10
Ease
9.0/10
Value
6.8/10
1
Lacerte Tax logo

Lacerte Tax

enterprise

Professional-grade tax software with robust support for Form 1120-S, including diagnostics, state filings, and e-filing for S Corporations.

Overall Rating9.6/10
Features
9.8/10
Ease of Use
8.7/10
Value
9.2/10
Standout Feature

Powerful diagnostics engine with Pathways guided navigation that proactively identifies 1120S-specific issues like basis limitations and apportionment errors before submission.

Lacerte Tax, from Intuit, is a premium professional tax preparation software tailored for CPAs and accounting firms handling complex returns like Form 1120S for S-Corporations. It supports full 1120S preparation, including Schedules K-1, M-1/M-2 reconciliations, state apportionments, and shareholder basis tracking. With powerful diagnostics, e-filing, and integrations like QuickBooks, it streamlines high-volume tax workflows while ensuring compliance.

Pros

  • Exceptional 1120S support with automated K-1 generation and multi-state filings
  • Advanced diagnostics and error-checking for 100% accuracy guarantee on e-filing
  • Seamless integrations with QuickBooks and prior-year imports for efficiency

Cons

  • Steep learning curve for beginners despite intuitive input screens
  • Premium pricing may not suit solo practitioners or small firms
  • Occasional performance lags with very large client databases

Best For

Mid-to-large CPA firms and tax professionals managing high volumes of complex S-Corp returns requiring robust compliance and diagnostics.

Pricing

Annual subscriptions start at ~$2,249 for base tax prep module, plus per-return fees (~$10-50/form) and add-ons for states/payroll; volume discounts for firms over 100 returns.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit Lacerte Taxaccountants.intuit.com
2
UltraTax CS logo

UltraTax CS

enterprise

Comprehensive tax preparation platform offering advanced 1120-S handling, multi-state support, and seamless integration for complex S Corp returns.

Overall Rating9.1/10
Features
9.6/10
Ease of Use
8.2/10
Value
8.7/10
Standout Feature

SmartDiag diagnostics system that performs real-time error checking, compliance validation, and optimization suggestions unique to complex 1120S filings

UltraTax CS from Thomson Reuters is a professional tax preparation software suite designed for CPAs and accounting firms, with strong capabilities for Form 1120S S Corporation returns. It features input-driven data entry, automated calculations across all schedules, and comprehensive diagnostics for accuracy and compliance. The software supports multi-state filings, shareholder basis tracking, and integration with trial balance imports from popular accounting systems. Overall, it streamlines complex corporate tax workflows while ensuring adherence to IRS requirements.

Pros

  • Exceptional handling of complex 1120S scenarios including K-1s, basis worksheets, and multi-state apportionments
  • Advanced diagnostics engine that flags errors and compliance issues proactively
  • Seamless integrations with QuickBooks, CCH Axcess, and other Thomson Reuters tools

Cons

  • Steep learning curve due to its depth and customization options
  • High subscription costs, especially for full federal/state modules
  • Resource-intensive, requiring robust hardware for optimal performance

Best For

Mid-to-large CPA firms managing intricate S Corporation returns with multi-state and shareholder complexities.

Pricing

Annual subscription model starting at ~$3,500 for 1120S module, scaling up to $10,000+ based on firm size, forms volume, and add-ons.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit UltraTax CStax.thomsonreuters.com
3
CCH Axcess Tax logo

CCH Axcess Tax

enterprise

Cloud-based tax solution with full Form 1120-S capabilities, workflow automation, and diagnostics tailored for S Corporation filings.

Overall Rating8.2/10
Features
9.1/10
Ease of Use
7.8/10
Value
7.5/10
Standout Feature

Intelligent Diagnostics engine that scans 1120S returns for compliance issues, basis limitations, and optimization opportunities in real-time

CCH Axcess Tax by Wolters Kluwer is a cloud-based professional tax preparation software suite designed for CPAs and accounting firms. It provides comprehensive support for Form 1120S S-Corporation returns, including multi-state compliance, K-1 preparation, shareholder basis tracking, and electronic filing. The platform integrates advanced diagnostics, workflow automation, and real-time collaboration to handle complex tax scenarios efficiently.

Pros

  • Robust 1120S support with multi-state apportionment and K-1 automation
  • Powerful diagnostics and compliance checks reduce errors
  • Seamless integration with CCH ProSystem fx and other firm management tools

Cons

  • Steep learning curve for new users
  • High subscription costs may deter smaller firms
  • Cloud dependency can lead to performance issues with poor internet

Best For

Mid-sized to large CPA firms handling complex, high-volume 1120S returns with multi-state requirements.

Pricing

Custom subscription pricing, typically $4,000-$12,000 per preparer annually based on firm size, modules, and return volume.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit CCH Axcess Taxwolterskluwer.com
4
Drake Tax logo

Drake Tax

specialized

Affordable professional tax software supporting 1120-S with unlimited e-filing, error checks, and K-1 generation for S Corps.

Overall Rating8.7/10
Features
9.1/10
Ease of Use
8.4/10
Value
9.3/10
Standout Feature

Comprehensive shareholder basis computation and tracking worksheets that simplify complex S-Corp allocations

Drake Tax from Drake Software is a comprehensive desktop-based tax preparation solution tailored for professionals handling Form 1120S S-Corporation returns, including federal, state, and K-1 preparations. It features robust diagnostics, automated calculations for shareholder basis, and seamless e-filing for all 50 states plus D.C. The software emphasizes accuracy and efficiency for business tax workflows, with strong support for complex distributions and composites.

Pros

  • Exceptional state support for 1120S returns in all jurisdictions
  • Powerful diagnostic engine and shareholder basis worksheets
  • Outstanding customer support with live chat and phone assistance

Cons

  • Primarily desktop-focused with limited cloud mobility
  • Interface feels dated compared to modern web-based competitors
  • Fewer native integrations with accounting software like QuickBooks

Best For

Small to mid-sized tax firms and preparers seeking reliable, cost-effective 1120S filing with extensive state coverage and top-tier support.

Pricing

Starts at $495 for basic 1120S package; full business suite around $1,695-$1,995 annually with unlimited e-filing and states.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit Drake Taxdrakesoftware.com
5
ProSeries Professional logo

ProSeries Professional

specialized

User-friendly tax prep software that efficiently handles Form 1120-S for small to mid-sized S Corporations with integrated e-filing.

Overall Rating8.6/10
Features
9.1/10
Ease of Use
8.0/10
Value
8.2/10
Standout Feature

Advanced shareholder basis tracking and automated K-1 distribution

ProSeries Professional is a robust tax preparation software from Intuit tailored for professional accountants, providing comprehensive support for Form 1120S S-Corporation returns including schedules, K-1s, and state filings. It features automated calculations, diagnostic tools, and seamless e-filing to streamline complex corporate tax workflows. The software integrates with QuickBooks for easy data import, making it suitable for firms handling multiple business returns.

Pros

  • Strong 1120S support with advanced shareholder basis worksheets and K-1 generation
  • Reliable diagnostics, error checks, and multi-state e-filing capabilities
  • Seamless integration with QuickBooks and prior-year data import

Cons

  • Higher pricing compared to some specialized 1120S alternatives
  • Interface feels somewhat dated and less intuitive for beginners
  • Limited advanced customization for highly complex S-Corp scenarios

Best For

Mid-sized tax firms and CPAs preparing a high volume of 1120S returns with QuickBooks integration needs.

Pricing

Subscription starts at ~$1,500/year for basic professional edition; scales to $3,000+ with state and advanced modules.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit ProSeries Professionalproseries.intuit.com
6
GoSystem Tax RS logo

GoSystem Tax RS

enterprise

Scalable tax preparation tool providing detailed 1120-S support, custom calculations, and multi-user collaboration for S Corps.

Overall Rating8.6/10
Features
9.3/10
Ease of Use
7.4/10
Value
8.1/10
Standout Feature

Relational database engine that maintains peak performance even with thousands of returns and clients

GoSystem Tax RS from Wolters Kluwer is an enterprise-grade, web-based tax preparation software tailored for professional firms handling complex 1120S S Corporation returns. It excels in shareholder basis tracking, multi-state apportionments, diagnostics for K-1s, and automated workflows for high-volume filings. The platform integrates with the broader CCH Axcess suite for practice management and document storage.

Pros

  • Superior handling of complex 1120S scenarios like multi-state and consolidated returns
  • Robust diagnostics and error-checking for accurate K-1 distributions
  • Scalable relational database architecture for large client portfolios

Cons

  • Steep learning curve and interface less intuitive for smaller firms
  • High cost unsuitable for solo practitioners or small teams
  • Limited customization options compared to some competitors

Best For

Mid-to-large CPA firms with high-volume, complex 1120S returns requiring enterprise scalability.

Pricing

Enterprise subscription pricing; custom quotes typically $4,000-$10,000+ annually per preparer, depending on firm size and modules.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit GoSystem Tax RSwolterskluwer.com
7
TaxSlayer Pro logo

TaxSlayer Pro

specialized

Cost-effective professional software for preparing and e-filing Form 1120-S with strong support for S Corporation schedules and states.

Overall Rating7.7/10
Features
7.5/10
Ease of Use
8.0/10
Value
9.2/10
Standout Feature

Flexible pay-per-return model with no upcharges for 1120S or state filings

TaxSlayer Pro is a cloud-based professional tax software tailored for tax preparers, offering robust support for Form 1120S S-Corporation returns including Schedules K, K-1s, and shareholder basis worksheets. It enables electronic filing for federal and most state returns, with built-in diagnostics and data import from prior years or QuickBooks. The platform emphasizes affordability and accessibility, making it suitable for firms handling moderate volumes of business returns.

Pros

  • Highly affordable pricing with no hidden fees for 1120S forms
  • Reliable e-filing and high IRS acceptance rates
  • Cloud-based access from any device with strong security

Cons

  • Interface feels dated compared to premium competitors
  • Limited advanced planning tools for complex S-Corps
  • Customer support can be slower during peak season

Best For

Small to mid-sized tax firms or solo preparers focused on cost-effective 1120S filing for straightforward S-Corporations.

Pricing

Starts at $1,245/year for 100 federal returns (pay-per-return from $5/return); unlimited states included in base plans.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit TaxSlayer Protaxslayerpro.com
8
ProConnect Tax Online logo

ProConnect Tax Online

specialized

Cloud-hosted tax software from Intuit with reliable 1120-S functionality, real-time updates, and easy K-1 distribution.

Overall Rating8.1/10
Features
8.5/10
Ease of Use
7.7/10
Value
7.6/10
Standout Feature

Real-time collaborative editing allowing multiple preparers to work on the same 1120S return simultaneously

ProConnect Tax Online is a cloud-based professional tax preparation platform from Intuit, tailored for accountants handling complex returns like Form 1120S for S-Corporations. It streamlines 1120S filing with automated calculations for shareholder basis, K-1 distributions, and multi-state apportionments. The software integrates with QuickBooks for efficient data import and supports real-time collaboration across teams.

Pros

  • Strong 1120S support with advanced shareholder tracking and diagnostics
  • Cloud-based access with automatic updates and mobile compatibility
  • Seamless integration with QuickBooks for trial balance imports

Cons

  • Higher pricing model with per-return fees adding up quickly
  • Learning curve for complex 1120S workflows despite intuitive interface
  • Occasional performance lags during peak tax season

Best For

Mid-sized accounting firms using Intuit tools that prioritize cloud collaboration for 1120S returns.

Pricing

Annual subscription starts at ~$1,500/user plus $10-50 per 1120S return; volume discounts available.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit ProConnect Tax Onlineaccountants.intuit.com
9
TaxAct Professional logo

TaxAct Professional

specialized

Budget-friendly tax prep solution supporting Form 1120-S e-filing, depreciation tools, and S Corp specific optimizations.

Overall Rating7.8/10
Features
7.5/10
Ease of Use
8.5/10
Value
9.2/10
Standout Feature

Budget-friendly Q&A interview format that mimics consumer tax software for quick, error-reduced S-Corp preparation

TaxAct Professional is an affordable tax preparation software tailored for CPAs and tax pros handling Form 1120S S-Corporation returns, supporting federal and multi-state filings with e-filing capabilities. It features an intuitive Q&A-driven interview process, automated calculations, diagnostics, and prior-year data import to streamline workflows. Ideal for smaller practices, it prioritizes cost-efficiency and reliability over enterprise-level complexity.

Pros

  • Exceptionally low pricing with per-return or bundled options
  • User-friendly interview-style interface that speeds up data entry
  • Reliable e-filing for federal and most states with strong diagnostics

Cons

  • Lacks advanced features for highly complex S-Corp returns like those in top-tier software
  • Customer support is email/phone-based without live chat or 24/7 access
  • Limited third-party integrations compared to competitors

Best For

Small to mid-sized tax firms or solo practitioners preparing straightforward 1120S returns on a tight budget.

Pricing

Federal 1120S starts at $124 per return; bundles with states from $169; volume discounts and annual subscriptions reduce costs further.

Official docs verifiedFeature audit 2026Independent reviewAI-verified
10
TurboTax Business logo

TurboTax Business

specialized

Desktop software for small S Corporations to prepare and print Form 1120-S with guided interviews and K-1 exports.

Overall Rating7.6/10
Features
7.8/10
Ease of Use
9.0/10
Value
6.8/10
Standout Feature

One-click import from QuickBooks to automatically populate 1120S forms and schedules

TurboTax Business is a desktop tax preparation software from Intuit designed for small businesses, including S Corporations filing Form 1120S, partnerships, and multi-member LLCs. It offers a guided interview process to input financial data, calculate deductions, generate Schedule K-1s, and prepare state returns. The software supports e-filing and includes error-checking tools to ensure compliance with IRS requirements for 1120S returns.

Pros

  • Intuitive step-by-step interview process simplifies complex 1120S preparation
  • Seamless integration with QuickBooks for easy data import
  • Reliable e-filing, error checks, and audit support included

Cons

  • Higher cost compared to basic online alternatives
  • Desktop-only software requires download and installation
  • Less suitable for highly complex S Corps with advanced needs

Best For

Small S Corporation owners familiar with QuickBooks who want guided, user-friendly tax filing without hiring a professional.

Pricing

Approximately $190 for federal and one state return (desktop download; additional states extra).

Official docs verifiedFeature audit 2026Independent reviewAI-verified
Visit TurboTax Businessturbotax.intuit.com

Conclusion

The reviewed 1120S software caters to diverse needs, with Lacerte Tax emerging as the top choice, offering robust support, diagnostics, and end-to-end filing capabilities. UltraTax CS and CCH Axcess Tax are standout alternatives, excelling in complex multi-state handling and cloud-based automation, respectively. Readers can find the best fit by aligning features with their specific S Corporation requirements.

Lacerte Tax logo
Our Top Pick
Lacerte Tax

Take the next step with Lacerte Tax to streamline your S Corporation filings and leverage its professional-grade tools—an investment in efficiency that leads the pack.