IRS wanting more forms

[togo21]

Received a letter (LTR 12C) from IRS asking for certain pages of a 1040SR form, amounts and date of all estimated tax payments, supporting documents verifying income and withholding and a copy of the letter.  They said I could mail, fax or upload through IRS..

I have all of the documents ready to send but am unable to create a irs.gov account.  The address they have listed looks bogus.  It is STOP 6120, Kansas City, MO 64999.

Wondering why they do not have this information already as I efiled with Turbo Tax 2/7/26.  

can you help me with what I should do?

Thank you.

Toni Goeke

[MindyB]

The IRS address in Kansas City (Zip Code 64999) is a legitimate processing center, and receiving Letter 12C is just a request for manual verification of details your e-file couldn't automatically confirm, often due to a mismatch in reported withholding or estimated tax payments as compared to what they expected. 

To resolve this, you should send the requested documents, including the IRS letter to one of the methods provided. If you prefer to mail them to the Missouri address, I suggest you use Certified Mail with a Return Receipt for your records, as this provides legal proof of delivery while you wait for the IRS to finish processing your 2025 return. Faxing, however, will be cheaper and provide you with an instant proof of submission.

[togo21]

Thank you for your response.  I mailed the forms yesterday.

[Dcurious]

I received same letter 12c this week.  Wondering if you have received any response from IRS?

[PatriciaV]

The IRS has announced that they are backlogged on correspondence. The notice you received was most likely computer-driven. Your response will be processed by an agent who handles thousands of returns. You may not receive a response for several months.

@Dcurious 

[Dcurious]

So the IRS can keep our refund money as long as they want?  Have never had any issue until this year and never had so many problems using TurboTax as I did this year.  Have people received their refunds or did I just lose almost 5k?  I pay estimated taxes but maybe need to stop doing that if they aren’t refunding overpayment.  Any idea if this will happen again and if so how to prevent it?  Maybe I should just mail returns instead of efile so I know they receive all the correct paperwork.

[VolvoGirl]

Has the IRS sent you a letter yet?  You can log into your IRS account and check.    If the IRS sends you the refund late they will add interest.   What does the IRS say at Where’s My Refund
https://www.irs.gov/refunds

When did you file?  Was your return Accepted?  Better double check if it went though.  When you efile you get back 2 emails. The first email only confirms the transmission. The second email says if the IRS (or state) Accepted or Rejected your efile. Check back though your emails and spam/junk folder.

When you log into your account you should also see the status and if it was Accepted or Rejected, Started, Printed, Ready to Mail, etc. What does it say?