MARQUETTE – The Michigan Department of Treasury has announced that the official 2026 filing season has begun and is processing individual income tax returns.

Individuals can file their state individual income tax return online for free, e-file with tax preparation software, or mail a paper form with documentation. All state of Michigan individual income tax returns and payment of any taxes owed must be received by April 15.

For the convenience of taxpayers, the start of the state’s individual income tax filing season is the same date set by the Internal Revenue Service.

“Michigan Treasury is prepared to process returns and issue refunds promptly,” said Deputy State Treasurer Kavita Kale, who oversees the department’s Revenue Services programs. “Our priority is accuracy and efficiency. Filing electronically is the fastest and most reliable way to ensure your return is processed correctly and your refund is delivered quickly.”

Issuers must mail most W-2 and 1099 forms to recipients by Jan. 31. End-of-year pay stubs should not be used when filing because they may not accurately reflect total income.

Taxpayers who file without all required documents — such as W-2 or 1099 forms — may need to submit an amended return later. Missing paperwork can delay processing and push back refunds.