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How to Submit Tax Withholding Forms

Feb 7, 2023, 09:48 AM by MOSERS
I wanted to change my tax withholding and after talking to the operator at Mosers, I understand I can't complete the form I used to for a change in the amount. I got the Authorization completed online and printed off to sign, but was unable to fill out the W-4P online so I printed and now am completing by hand. I guess I will have to mail the forms; didn't see instructions that I could email them to you online. And of course since I am needing to complete by hand the W-4P I am unable to email

You are correct, there is a new form, which is required by the IRS as of January 1, 2023, IF you want to make any changes to your tax withholdings. (If you don’t want to make changes, no action is required.) Once you have completed both the Tax Withholding Authorization and the IRS W-4P forms and you have signed and dated them, you can return them to us by:

  1. Faxing them to (573) 632-6103,
  2. Scanning them and sending them as an attachment via email to,
  3. Submitting them using the Document Upload feature after you have logged in to myMOSERS
  4. Depositing them in the drop box outside of our office or bringing them in to the receptionist, or
  5. Mailing them to us at MOSERS, PO Box 209, Jefferson City, MO 65102-0209
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