Form MO1040 (2023): Missouri Individual Income Tax Return - Long Form

The Missouri Individual Income Tax Return - Long Form (MO 1040) is used by Missouri residents to report their income, deductions, and credits for the tax year 2023. It's essentially a document you file with the state of Missouri to determine how much income tax you owe or if you're eligible for a refund.

Who Must File MO 1040?

  • Generally, all Missouri residents who earned income during the tax year are required to file a tax return, regardless of their income level.
  • You may also need to file if you owe certain taxes, even if you didn't earn enough income to be required to file federally.

What Information Do I Need to File MO 1040?

You will need various documents to complete your MO 1040 accurately. Here are some of the most common:

  • W-2 forms from all employers
  • 1099 forms for interest income, dividends, unemployment compensation, etc.
  • Documentation of any income deductions or tax credits you are claiming

Due Date and Extensions for Form MO 1040:

  • The deadline to file your MO 1040 is typically April 15th of the following year (in this case, April 15, 2024).
  • If you need more time to file, you can request an extension by filing Form MO-60 with the Missouri Department of Revenue by April 15th, 2024. However, even with an extension to file, any taxes owed are still due by April 15th.

Why Should You File MO 1040?

A. Even if you don't owe taxes, filing a return may allow you to claim a refund for any Missouri income tax withheld from your wages.

B. Filing history can be helpful for obtaining loans, applying for government benefits, or entering certain professions.

How to File MO 1040?

A. You can file electronically (e-filing) through an authorized tax filing software or website. This is generally the faster and more accurate way to file.

B. You can also file a paper return (Download the Form MO 1040 attached below) by mailing it to the Missouri Department of Revenue.

To access the current year's Form MO 1040, click here.