
Finish your business taxes by September 15.
TaxAct helps you finish your Partnership (Form 1065) or S Corporation (Form 1120-S) return with step-by-step guidance, trusted accuracy, and more.
File TodayFinish your business
taxes by September 15.
TaxAct helps you finish your Partnership (Form 1065) or S Corporation (Form 1120-S) return with step-by-step guidance, trusted accuracy, and more.
File TodayWhy file with TaxAct?
Maximize deductions
Our tools uncover deductions and credits that could save your business money.
Stay compliant
Built-in accuracy checks help you file correctly and avoid costly mistakes.
Data privacy & security
Our safeguards, procedures, and practices help keep your data safe and protected.
UPFRONT, TRANSPARENT PRICING
File your business taxes with confidence.
However your business is structured, we've got your back every step of the way.
Partnerships
Start FilingFile Form 1065 as a business with two or more partners.
S-Corporations
Start FilingFile Form 1120-S to pass income through to shareholders.
Need help finishing?
Add Xpert Assist to get unlimited access to tax experts while you prepare your return.

Extra peace of mind with Audit Defense.
Protect your business when you add Audit Defense, so you'll have professional support if the IRS ever contacts you.
Learn MoreDon't miss the deadline.
Complete your business tax return with confidence before September 15.
File todayFrequently Asked Questions
Yes. Even if you filed your tax extension through another tax provider or directly with the IRS, you can still use TaxAct to prepare and file your business or individual return. Just be sure your extension was submitted by the applicable IRS deadline, and TaxAct will walk you through the rest.
No. A tax extension only gives you more time to file, not to pay. Any estimated taxes owed for your business must still be paid by the original due date (March 15 or April 15, depending on entity type). Failing to pay on time can result in interest and late-payment penalties.
Most states allow business tax extensions, but requirements and deadlines vary. Some states honor your federal extension automatically, while others require a separate state-specific form. Be sure to check with your state's tax authority or use TaxAct's state filing guidance.
The due date for filing Form 1120-S is typically the 15th day of the third month following the end of the tax year. For most S Corps using a calendar year, the form is due by March 15. For fiscal year filers, the due date is the 15th day of the third month after the end of your fiscal year. If you need more time to file, you can request a tax extension by submitting Form 7004 to the IRS before the original due date. This extension gives you six additional months to file Form 1120-S, moving the deadline to September 15 for calendar-year S Corps.
For a calendar-year Partnership, the 2025 return was due March 16, 2026 (since the usual March 15 date fell on a Sunday). Fiscal-year Partnerships generally file by the 15th day of the third month after the tax year ends. If you need more time, file Form 7004 by the original due date for an automatic six-month extension.
September 15, 2026, for Partnerships, S Corps, and multi-member LLCs taxed as partnerships. October 15, 2026, for Sole Proprietorships, calendar-year C Corporations, and single-member LLCs. Remember, if either of the above due dates falls on a weekend or holiday, the deadline gets pushed to the next business day.
If you miss the Form 1120-S due date, the IRS may charge a late-filing penalty — even if your S Corporation owes no federal income tax. For returns due in 2026, the penalty is generally $255 per shareholder for each month, or part of a month, the return is late, up to 12 months.
TaxAct costs less: “File for less” and percentage savings claims based on comparison with TurboTax federal pricing for paid consumer online 1040 filing products on 04/01/2026.
Maximum Refund Guarantee: We guarantee you’ll receive your maximum refund when you use TaxAct’s individual 1040 products (the “Service”). If, using the same information, a registered user of the Service receives a larger refund or owes a smaller tax due amount using another online tax preparation product, we will refund the applicable federal and/or state software purchase price paid. All other fees are excluded. Subject to additional terms, conditions, and eligibility requirements. Find out more about our Maximum Refund Guarantee.
$100k Accuracy Guarantee: We guarantee our software is 100% accurate and will calculate your maximum refund under applicable law. If a software error results in a smaller refund or higher tax liability than using the same data with another tax preparation product, we will refund the software fees you paid; pay the difference as determined by the IRS or applicable state taxing authority; and cover any resulting penalties, interest, and reasonably documented legal and audit costs, up to $100,000 per customer. Applies only to individual, self-prepared 1040 products and is subject to additional terms, conditions, and eligibility requirements. Find out more about our $100k Accuracy Guarantee.
100% Satisfaction Guarantee: Applies to TaxAct online products only. If you are a registered user using the Services online and are dissatisfied with the Services prior to completing the billing steps within the program, your exclusive remedy is to immediately discontinue using the Services. If you are a registered user who completed the billing steps and have not printed or e-filed or your e-file was rejected by the IRS or State and you cannot re-file, it is your responsibility to contact us within the calendar year of the purchase to request a refund of fee(s) paid. Find out more about our 100% Satisfaction Guarantee.
TaxAct Xpert Assist: TaxAct® Xpert Assist® is available as an added service to users of TaxAct’s online consumer and SMB 1120-S and 1065 products. This service is available at an additional cost and is subject to limitations and restrictions. Some tax topics or situations may not be included as part of this service. Review of customer return if requested is broad and does not include source documents. View full TaxAct Xpert Assist Terms.
TaxAct Xpert Full Service: TaxAct® Xpert Full Service™ is offered subject to availability at TaxAct’s sole discretion. The service is complete upon the filing of prepared federal 1040 or 1120‑S/1065 business tax return and applicable state tax return(s). Service does not include access to TaxAct’s other software products, DIY features, municipal/local tax filings, foreign filings, prior‑year returns, or certain complex tax situations. The service is provided on a per‑return basis and may be cancelled at any time by TaxAct. Restrictions apply. See Xpert Full Service Terms for further details.
Start free, file free: The TaxAct Online Free Edition makes free federal filing available for those who qualify based on income and deductions. See if you qualify for free federal filing and what is included in this year’s Free Edition. For all other online products, you can start free and pay when you file. This means you will not be charged if you decide to stop using any product prior to printing or e-filing your return.
Edition pricing: Actual prices are determined at the time of payment, print, or e-file and are subject to change without notice. Add sales tax for applicable orders. Offers may end at any time and promotional offers may not be combined.
Exceptional customer care: Customer care does not include tax advice.
Deduction Maximizer: TaxAct's Deduction Maximizer guides you step by step through the process of completing your return in a way that helps you uncover additional tax advantages and helps you maximize your deductions by checking dozens of additional deductions we know from experience folks don't think to look for. Each deduction you claim may reduce the amount of tax you owe, resulting in a lower IRS bill overall.
Audit Defense: See Audit Defense provided by Tax Protection Plus (PDF) for further details of services and requirements. May not apply to certain forms and credits. Certain customers may not qualify for services based on past tax audit history, residency, or other factors. Audit Defense is not insurance. Audit Defense is subject to terms and conditions (PDF) located on Tax Protection Plus' website.
Partners: TaxAct gets fees from some third parties that provide offers to its customers. This compensation may affect what and how we communicate their services to you. TaxAct is not a party to any transactions you may choose to enter into with these third parties.
Real people. Real reviews: All reviews are from verified TaxAct customers. Reviews are managed by Bazaarvoice and comply with the Bazaarvoice Authenticity Policy. Cumulative star rating is for all TaxAct products.
Refund Transfer: Refund Transfers are fee-based products offered by Republic Bank & Trust Company, Member FDIC. A Refund Transfer Fee and all other authorized amounts will be deducted from the taxpayer’s tax refund. In order to use Refund Transfer, you must first qualify and choose to pay for your service using Refund Transfer.
Refer a Friend: Offer valid through October 31, 2026. For each friend you refer to TaxAct who did not prepare and file using us last year, you get a $20 Amazon Gift Card after they file their taxes using TaxAct’s 2025 Deluxe, Premier or Self-Employed product. Even better, they get 20% off our federal tax filing products by using the share link you receive from us. The total maximum reward payout per calendar year you may receive is $599.
Amazon is not a sponsor of this promotion. Except as required by law, Amazon Gift Cards ("GCs") cannot be transferred for value or redeemed for cash. GCs may be used only for purchases of eligible goods at Amazon.com or certain of its affiliated websites. For complete terms and conditions, see Amazon.com Gift Card Terms and Conditions. GCs are issued by ACI Gift Cards, Inc., a Washington corporation. All Amazon ®, TM, and © are IP of Amazon.com, Inc. or its affiliates. No expiration date or service fees.
This offer is for TaxAct’s consumer federal, online 1040 returns and is subject to specific terms and conditions. See terms and conditions for more information. Offer is subject to change.
E-File Concierge: E-File Concierge™ service provides phone calls and related support regarding federal e-file status changes using the phone number provided in My Account. Service is subject to availability and limited to federal e-filed tax returns.
Most popular: TaxAct Deluxe is our most popular product among our online customers with more complex tax situations.
Over 113 million returns filed: Based on e-filed federal returns through TaxAct Consumer and TaxAct Professional software since 2000.
Refund amounts shown: Actual refund amounts vary based on your tax situation. Number shown in illustrations are based on IRS published data stating the average refund was $3,804 as of February 20, 2026.
Trademarks: All trademarks not owned by TaxAct, LLC that appear on this website are the property of their respective owners, who are not affiliated with, connected to, or sponsored by or of TaxAct, LLC. TurboTax is a registered trademark of Intuit, Inc. H&R Block is a registered trademark of HRB Innovations, Inc. TaxSlayer is registered trademark of TaxSlayer LLC. FreeTaxUSA is registered trademark of TaxHawk, Inc.