Form MO-1040A - Single/Married (Income from One Spouse) Short Form - Complete a MO W-4

Sep 19, 2026

MO-1040A is a 2024 Missouri Individual Income Tax short form for single filers or one-income married filers. It explains eligibility requirements, when the form cannot be used (e.g., amended returns, spouse income, other-state income, military pay, NOL, and various Missouri modifications), and how to complete or update a MO W-4 annually. The guide also covers electronic filing benefits, federal/state e-file options, 2-D barcode filing, refund and balance-due mailing addresses, and where to find assistance and answers to frequently asked questions.

LanguageEnglish

CategoryForms

FormatPDF

Pages11

Reading Time4 min

AccessFree to download

Electronic Filing Options/Benefits of Electronic Filing

Electronic filing options

Benefits of electronic filing

Assistance with Preparing Your Tax Return

Volunteer groups for tax help

2-D BARCODE RETURNS

When to use 2-D barcode

Mailing addresses for barcode returns

Do You Have the Right Form?

Eligibility for MO-1040A

Special filing situations when you cannot use the form

Forms

Diagram of Form W-2

Form MO-1040A

Form MO-1040V

WHAT’S INSIDE

Tax chart and other referenced sections

2024 Form MO-1040A Single/Married (Income from One Spouse) Short Form Complete a MO W-4 We encourage you to review and complete a new W-4 each year, especially if your filing status has changed. Request a W-4 from your employer or print [it at](it at dor.mo.gov/forms/)[ ](it at dor.mo.gov/forms/)[dor.mo.gov/forms/](it at dor.mo.gov/forms/) . Sign up to Receive Return Status Updates Get text or email notifications each time the status of your return changes. See page 5 for more information. File Electronically Electronic filing is fast and easy. See page 2 for details. ! Tax Deadline is April 15. See page 4 for extensions. Electronic Filing Options for Federal and State E-File Missouri, in cooperation with the Internal Revenue Service (IRS), offers a joint federal and state filing of individual income tax returns. There are two ways that you may e-file your federal and state income tax returns: 1) You can electronically file your federal and state returns online from websites provided by approved software providers. Many providers offer free filing if you meet certain conditions. A list of approved providers can be found [at](at dor.mo.gov/taxation/individual/tax-types/)[ ](at dor.mo.gov/taxation/individual/tax-types/)[dor.mo.gov/taxation/individual/tax-types/](at dor.mo.gov/taxation/individual/tax-types/)[ ](at dor.mo.gov/taxation/individual/tax-types/)[income/vendors.html\#freeonline](income/vendors.html#freeonline.)[.](income/vendors.html#freeonline.) 2) You can have a tax preparer (if approved by the IRS) electronically file your federal and state returns for you, usually for a fee. A list of approved tax preparers can be found [at](at dor.mo.gov/taxation/indi)[ ](at dor.mo.gov/taxation/indi)[dor.mo.gov/taxation/indi](at dor.mo.gov/taxation/indi)vidual/tax-types/income/ . BENEFITS OF ELECTRONIC FILING Convenience: You can electronically file 24 hours a day, 7 days a week. If you electronically file DO NOT mail a copy of your return. Security: Your tax return information is encrypted and transmitted over secure lines to ensure confidentiality. Accuracy: Electronically filed returns have fewer errors than paper returns. Direct Deposit: You can have your refund directly deposited into your bank account. Proof of Filing: An acknowledgment is issued when your return is received and accepted. ASSISTANCE WITH PREPARING YOUR TAX RETURN There are a large number of volunteer groups around Missouri providing tax assistance to elderly or lower income taxpayers. To locate a volunteer group near you that offers return preparation assistance: call 800-906- 9887, 888-227-7669 [or visit](or visit dor.mo.gov/taxation/individual/tax-types/)[ ](or visit dor.mo.gov/taxation/individual/tax-types/)[dor.mo.gov/taxation/individual/tax-types/](or visit dor.mo.gov/taxation/individual/tax-types/)[ ](or visit dor.mo.gov/taxation/individual/tax-types/)[income/](income/.)[.](income/.) You will find a larger volume of volunteer centers open during the filing season, which is typically January through April. If you plan to file a paper return, you should consider 2-D barcode filing. The software encodes all your tax information into a 2-D barcode, which allows your return to be processed with fewer errors compared to traditional paper returns. If you use software to prepare your return, check our website for approved 2-D barcode software companies. Also, check out the Department’s fill-in forms that automatically calculate and provide your return with a 2-D barcode. You can have your refund directly deposited into your bank account when you use the Department’s fill-in forms. If your form has a 2-D barcode, mail your return to the Department of Revenue address as indicated below: Refund returns: P. O. Box 3222, Jefferson City, MO 65105-3222 Balance due returns: P. O. Box 3370, Jefferson City, MO 65105-3370 Email: [Incometaxprocessing@dor.mo.gov](Incometaxprocessing@dor.mo.gov) (For submissio

FAQs

Who can use Form MO-1040A for the 2024 Missouri return?

Use MO-1040A if you are a one-income filer (one spouse has income if married) or single, you had Missouri income as a resident/nonresident/part-year resident, you claim the standard or itemized deductions, and you do not claim tax credits or modifications to your income.

In which cases can’t I use Form MO-1040A?

You cannot use it for special situations such as amended returns, both spouses having income, income from another state, military pay, Net Operating Loss (NOL), or certain Missouri modifications (including partnership/fiduciary/S corporation adjustments and other listed modifications).

What are the electronic filing options and main benefits?

You can e-file online through approved software providers or have an IRS-approved tax preparer e-file for you. Benefits include convenience (24/7), secure encryption, fewer errors than paper returns, direct deposit of refunds, and a proof of filing through an acknowledgment when the return is accepted.

Sep 19, 2026

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