Your March 2026 Business Tax Roadmap: Deadlines & Compliance

March is a pivotal month for business owners in Indiana and across the Midwest. While individual tax season captures most of the headlines, the deadlines landing in March 2026 are arguably more complex—and the penalties for missing them can be steeper. For businesses, particularly Partnerships and S Corporations, this month sets the tone for your entire financial year.

At Midwest Tax Resolution, LLC, we know that staying ahead of these dates is the best way to prevent the kind of tax debt situations we help our clients resolve daily. Whether you are managing your compliance proactively or working to catch up on past years, here is what you need to know for March.

March 2: The Paper Filing Deadline

While we strongly encourage electronic filing for accuracy and efficiency, businesses that still file paper information returns must meet this deadline. If you miss this date, you risk penalties that can accumulate quickly.

  • Information Returns: File government copies of Forms 1099 (excluding the 1099-NEC which was due in February) and the transmittal Form 1096.
  • Gambling Winnings: Payers must file Form 1096 and Copy A of all Forms W-2G.
  • Health Coverage (ACA): Applicable Large Employers (ALEs) filing paper forms must submit Forms 1094-C and 1095-C. Other providers of minimum essential coverage must file Forms 1094-B and 1095-B.
  • Tip Reporting: Large food and beverage establishments must file Form 8027.
  • Farmers and Fishermen: File your 2025 Form 1040 and pay any tax due. If you paid your estimated tax by January 15, you have until April 15 to file.

Note: If you file these forms electronically, your deadline is generally extended to March 31 (details below).

March 2: Providing Forms to Recipients

In addition to filing with the IRS, you must furnish health coverage information to individuals by this date. ALEs must provide Form 1095-C to full-time employees, and other providers must issue Form 1095-B to responsible individuals.

March 16: The Pass-Through Entity Deadline

This is the most critical date of the month for many of our clients in Carmel and the surrounding areas. If your business is organized as a Partnership or S Corporation, your return is due.

Partnerships (Form 1065)

You must file your 2025 return and provide each partner with their Schedule K-1 (and Schedule K-3 if applicable). These schedules report the partner's share of income, deductions, and credits, which they need to file their personal returns.

Take Control of Your Tax Situation
We’ve helped countless individuals and businesses get back on track with the IRS. Reach out today for a confidential consultation and start moving toward financial relief.
Contact Us

S Corporations (Form 1120-S)

File the 2025 income tax return and pay any tax due. Similar to partnerships, you must issue Schedule K-1 to each shareholder.

Need More Time?

If you cannot file by March 16, you must file Form 7004 to request an automatic 6-month extension. However, please remember: an extension to file is not an extension to pay. S Corporations must estimate and pay any tax owed by March 16 to avoid interest and penalties. We frequently see clients fall into tax debt because they filed an extension but neglected the payment.

S Corporation Election (Form 2553)

If you want your business to be taxed as an S Corp for the calendar year 2026 to potentially lower self-employment taxes, you must file Form 2553 by March 16. Filing late means the election won't take effect until 2027.

March 31: Electronic Filing Deadline

If you utilize electronic filing—which is our preferred method for its speed and security—you have until the end of the month to file the following with the IRS:

  • Forms 1099 (other than 1099-NEC) and 1096
  • Forms W-2G
  • Forms 1094-C, 1095-C, 1094-B, and 1095-B
  • Form 8027 (Tip Income)

Additional Considerations

Payroll and Withholding: If you are on a monthly deposit schedule, standard Social Security, Medicare, and withheld income tax deposits for February payments are due March 16.

Weekends and Holidays: When a due date falls on a weekend or legal holiday, it moves to the next business day.

Disaster Area Extensions: If you are in a designated disaster area, the IRS may grant additional time. To check the status of a specific area, please visit:

FEMA: https://www.fema.gov/disaster/declarations
IRS: https://www.irs.gov/newsroom/tax-relief-in-disaster-situations

We Are Here to Help

Navigating these dates can be stressful, especially if you have unfiled returns from previous years hanging over your head. At Midwest Tax Resolution, LLC, we specialize in helping individuals and businesses resolve tax trouble and get back on track. If you are overwhelmed by compliance or facing collection issues, contact us today to discuss an equitable solution.

Take Control of Your Tax Situation
We’ve helped countless individuals and businesses get back on track with the IRS. Reach out today for a confidential consultation and start moving toward financial relief.
Contact Us
Share this article...

Sign up for our newsletter.

Each month, we will send you a roundup of our latest blog content covering the tax and accounting tips & insights you need to know.

I confirm this is a service inquiry and not an advertising message or solicitation. By clicking “Submit”, I acknowledge and agree to the creation of an account and to the and .

We care about the protection of your data.