Best Tax Software for LLC S-Corps in 2026 (Compared)

If you're searching for the best tax software for an LLC taxed as an S-corp, the short answer is: it depends on whether you just need to file Form 1120-S once a year, or whether you also need the bookkeeping and payroll that make that form accurate in the first place. TurboTax Business and TaxAct Business can both prepare Form 1120-S and the Schedule K-1s your shareholders need. FreeTaxUSA cannot file the 1120-S itself. None of them track your reasonable salary through real payroll or keep your books clean between January and December — which is usually where S-corp returns go wrong.

What Makes Tax Software 'Best' for an LLC Taxed as S-Corp

An LLC that has made the S-corp election with the IRS stops filing a simple Schedule C and starts filing a corporate return. That changes what you need from software.

Form 1120-S and Schedule K-1 support

Your LLC's S-corp return is Form 1120-S, U.S. Income Tax Return for an S Corporation. The IRS instructions for this form explain how income, deductions, and credits pass through to each owner on a Schedule K-1, which shareholders then report on their personal Form 1040 (IRS Instructions for Form 1120-S). Any tool you consider has to generate both the 1120-S and the K-1s correctly — software that only handles your personal return isn't enough once you've elected S-corp status.

Reasonable salary and payroll integration

The IRS requires S corporations to pay reasonable compensation to a shareholder-employee before any non-wage distributions can be made, specifically to prevent owners from avoiding self-employment tax by taking all their profit as distributions (IRS: S Corporation Compensation and Medical Insurance Issues). The IRS doesn't publish a fixed formula or percentage; reasonable compensation is based on facts and circumstances — your role, time devoted, training, what comparable businesses pay for similar work, and the company's financial results. Tax software that only prepares the return at filing time has no way to verify whether the salary you ran through payroll all year was reasonable; that number has to come from actual payroll records, not a year-end estimate.

Books-to-return accuracy

Form 1120-S pulls numbers directly from your books: revenue, cost of goods sold, officer compensation, other deductions. If expenses were categorized inconsistently during the year, the return inherits those errors. The best LLC business tax software either includes bookkeeping or integrates tightly enough with it that the numbers on the return match the numbers in your general ledger without a manual reconciliation project in March.

Top LLC S-Corp Tax Software Compared

TurboTax Business

TurboTax's desktop Business edition prepares Form 1120-S, 1120, 1065, and K-1s, and is priced around $190 for federal filing with five included e-files, based on pricing published on Intuit's own site. TurboTax also offers an online Expert Assist tier for S-corps with K-1s running roughly $639, and a Full Service tier where a tax expert files for you, priced near $1,549. TurboTax does not include payroll or bookkeeping — you still need a separate system to track reasonable salary and categorize expenses throughout the year.

TaxAct Business

TaxAct's online S-corporation product is currently priced at $169.99 for the federal Form 1120-S plus $69.99 per state return, per pricing published on taxact.com. Like TurboTax, TaxAct is a filing tool: it assumes your books are already closed and correctly categorized when you sit down to file, and it doesn't touch payroll at all.

FreeTaxUSA (and its limits for S-corps)

This is where a lot of LLC owners get tripped up. FreeTaxUSA lets you enter the Schedule K-1 you received from your S-corp on your personal return, but it does not prepare or file Form 1120-S itself — the company's own support community confirms FreeTaxUSA only handles Form 1040, not 1120, 1120-S, or 1065. If your LLC is taxed as an S-corp, FreeTaxUSA alone can't get your business return filed; you'd still need separate software or a preparer for the 1120-S.

Kangaroo ERP: AI bookkeeping + tax engine

Kangaroo ERP approaches this differently: instead of a once-a-year filing tool, it's a subscription platform that runs bookkeeping and tax filing together all year, so the numbers behind your 1120-S come from AI-categorized books rather than a last-minute cleanup. It pairs that with payroll so your reasonable salary runs through actual payroll cycles, not a guess entered at tax time. One important detail: S-corp filing, K-1 generation, and payroll are included starting on the Company plan ($490/month). The entry-level Solo plan ($399/month) is built for Schedule C/SE filers and does not include 1120-S preparation. Current plan details, including what's included at each tier, are on the pricing page.

*Requires the Kangaroo Company plan ($490/mo) or higher. The entry-level Solo plan ($399/mo) covers Schedule C/SE filings only and does not include S-corp filing, K-1 generation, or payroll.

At minimum, software built for an LLC taxed as an S-corp should meet three requirements: it must generate Form 1120-S and the related Schedule K-1s, it must connect to a payroll system that documents a reasonable salary for each shareholder-employee, and it must pull return figures from bookkeeping that's categorized consistently throughout the year rather than reconstructed at filing time.

Standalone Filing Software vs. All-in-One Platform: What You're Missing

TurboTax, TaxAct, and FreeTaxUSA are all built around the same assumption: you show up once a year with finished books and a salary figure you've already decided on, and the software's job is to turn that into a correctly formatted return. That works fine if you already have a bookkeeper and a payroll provider feeding clean numbers into the process.

What none of these tools do is help you get to that point. They don't flag that your officer compensation looks low relative to your net profit — a pattern the IRS specifically watches for under reasonable compensation rules. They don't categorize a year's worth of bank transactions. They don't run payroll. If your LLC elected S-corp status to save on self-employment tax, the software you file with in March has no visibility into whether you actually paid yourself correctly in April, July, or October — and by the time you're filing, it's too late to fix.

How Kangaroo ERP Prepares Your S-Corp for Filing Season

AI-categorized books all year

Kangaroo ERP's AI reads invoices and bank transactions as they come in and categorizes them against your chart of accounts, so the profit and loss figures feeding your 1120-S are built incrementally instead of reconstructed from twelve months of receipts in March.

Payroll for your reasonable salary

Once you've set a reasonable salary for your role — based on your duties, time commitment, and what similar businesses pay, per the IRS factors cited above — Kangaroo ERP's payroll runs it on a regular schedule and keeps the records that support that figure if it's ever questioned. This payroll functionality is part of the Company plan, alongside the S-corp filing itself.

Quarterly estimates without spreadsheets

Because bookkeeping stays current, the platform's tax engine can estimate quarterly obligations from real year-to-date numbers instead of a projection built in a spreadsheet. If you're deciding whether an LLC, multi-member LLC, or S-corp election fits your situation in the first place, the entity types overview walks through the differences.

Frequently Asked Questions

See below.

Informational content. It does not replace professional advice on your specific case.

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