Missouri Form 5805 is the one-page Address Change Request you send to the Missouri Department of Revenue to update your address on individual income tax and motor vehicle records.1Missouri Department of Revenue. Missouri Form 5805 – Address Change Request You can file it online through MyTax Missouri or mail the paper version to P.O. Box 100, Jefferson City, MO 65105-0100. It asks for your name, date of birth, the last four digits of your Social Security number, and your new address, and you sign it under penalty of perjury.
What the Form Covers
One submission can update individual income tax records, motor vehicle records, or both. If you have license plates, disabled placards, or boat and outboard motor titles registered in Missouri, you can list them on the form so those records move with you.1Missouri Department of Revenue. Missouri Form 5805 – Address Change Request
Form 5805 is not for businesses. Sales tax accounts, employer withholding, corporate income tax, and other business tax registrations use the Registration Change Request (Form 126) instead, which also handles changes to business names, officers, partners, and members.2Missouri Department of Revenue. Maintain Registration Information
How to Fill It Out
The form fits on one page. Each field is straightforward, but a couple have quirks worth flagging.1Missouri Department of Revenue. Missouri Form 5805 – Address Change Request
- Enter your first, middle, and last name exactly as they appear on your Missouri tax account.
- Put your date of birth in MM/DD/YYYY format.
- Give only the last four digits of your Social Security number. The form does not ask for the full number.
- Include a daytime phone number and email so the Department can reach you if something doesn’t match its records.
- The old address field is optional. Filling it in can help the Department find your existing records faster; leaving it blank won’t hold up processing.
- Provide the full new mailing address, including city, state, ZIP code, and county.
- Check whether you’re updating individual income tax records, motor vehicle records, or both.
- If you checked motor vehicle records, list every plate, disabled placard, and boat or outboard motor title number you want moved to the new address. This covers passenger cars, trucks, RVs, motorcycles, and trailers.
- Sign and date the form. The signature line carries a perjury declaration; you’re affirming the information is true and correct.
If you use the paper form, complete it in black or blue ink. The Department scans submissions, and lighter ink can cause processing errors.
How to Submit It
The Department of Revenue recommends filing online because it’s faster than mail.3Missouri Department of Revenue. How Do I Change My Address?
Online Through MyTax Missouri
Go to the Address Change Request page at mytax.mo.gov.4Missouri Department of Revenue. Address Change Request The online form mirrors the paper version and walks you through the same fields. You don’t need a MyTax account; the portal identifies you from the information you enter.
By Mail
Download Form 5805 from the Department of Revenue’s forms page, complete it, and mail it to:
Missouri Department of Revenue
P.O. Box 100
Jefferson City, MO 65105-0100
Keep a copy before you drop it in the mail. The Department does not typically send a confirmation letter after processing an address change, so your copy is your proof of submission.
After You Submit
Once the change is processed, future tax forms, refund checks, and assessment notices go to the new address. You can confirm the update by logging into the state’s online tax system or by calling the Department after a reasonable processing window.
Timing matters. If the Department mails a notice of deficiency or other official correspondence before your change takes effect, that notice is still legally valid even when it goes to your old address. A missed notice can turn into a missed payment deadline, and Missouri’s statutory interest rate on unpaid tax balances for 2026 is 7%.5Missouri Department of Revenue. Statutory Interest Rates File the change as soon as you know your new address.
Form 5805 Does Not Update the IRS
Changing your address with Missouri has no effect on your federal tax records. To update your address with the IRS, file federal Form 8822 (Change of Address), which the IRS says generally takes four to six weeks to process.6Internal Revenue Service. Change of Address A business with an EIN uses Form 8822-B and must report any change in the responsible party within 60 days.7Internal Revenue Service. About Form 8822-B, Change of Address or Responsible Party – Business