Reply to a HMRC tax credits check (TC122)

Use this form if you’ve had a tax credits check letter and need to send information to HM Revenue and Customs (HMRC).


Reply using the online form


Only use this form if HMRC has written to you asking for information.

You’ll need to sign in to, or set up a Government Gateway account to fill in the online form.

You’ll also need the following details:

  • the letter code that HMRC has given you
  • the evidence HMRC has asked for

You can submit up to 5 JPG, JPEG or PDF files containing the information to send with the form. They should each be less than 4.5MB in size. You can also send further information if you’ve already responded to a tax credit check.

You can also send a letter with the information HMRC has requested to:

Tax Credit Office - Operations C
HM Revenue and Customs

If you use the online form, you’ll get a reference number that you can use to track the progress of your form.

Tax credits checks
Find out about tax credit checks.

Published 21 April 2017