Missouri DOR Accepts 2025 Tax Returns, Recommends E-Filing

MO DOR News Releases

Published January 26th, 2026

Detected March 20th, 2026

Summary

The Missouri Department of Revenue (DOR) has begun accepting electronically filed 2025 state tax returns. The DOR encourages taxpayers to use e-filing and direct deposit for faster refunds and to avoid potential confusion with USPS postmark delays.

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What changed

The Missouri Department of Revenue (DOR) announced it is now accepting electronically filed 2025 state tax returns. The release highlights the benefits of e-filing, including faster refunds and accuracy, and advises taxpayers to be aware of potential USPS postmark delays that could affect mailed returns. It also directs taxpayers to resources for free e-filing options.

Taxpayers are encouraged to utilize e-filing for their 2025 returns to ensure timely submission and avoid confusion related to postal service timelines. The deadline for filing 2025 individual income tax returns remains April 15, 2026. Compliance officers should ensure internal communications reflect the DOR's recommendation for e-filing and highlight the potential issues with mail-in submissions.

What to do next

Advise taxpayers to use e-filing for 2025 returns.
Inform taxpayers about potential USPS postmark delays for mailed returns.
Direct taxpayers to DOR and IRS Free File resources for e-filing options.

Source document (simplified)

Department of Revenue News Release

Home » News »
News Item January 26, 2026

Department of Revenue Now Accepting 2025 Tax Returns
- USPS Postmark Delays May Cause Confusion -
JEFFERSON CITY, MO — Today marks the beginning of tax season as the Missouri Department of Revenue (DOR) is now accepting electronically filed state returns. As Missourians prepare, DOR is providing information and resources to help ensure a smooth process for everyone.

“The best way for a fast return is to e-file,” Missouri Director of Revenue Trish Vincent, said. “If citizens are filing by mail and relying on the postmark for verification, they need to be aware of recent changes in the postal system; just because you drop your mail in the slot at the post office doesn’t mean it will be postmarked that day.” To reduce confusion when mailing time-sensitive documents, such as tax returns, individuals are encouraged to review the U.S. Postal Service rule.

Because electronic filing is an accurate and secure way to file returns, DOR is encouraging citizens to use this method and choose the direct deposit option. Generally, e-filers will receive their refunds faster than those who file paper returns.

Many Missourians may also qualify for free e-filing services through the Free File Alliance, which allows eligible taxpayers to file their federal and state income tax returns using approved software. For more information, visit the IRS Free File website or DOR’s Online Filing resource page.

E-file to avoid postmark confusion. The due date for 2025 individual income tax returns is April 15, 2026.