When you prepared your 2021 tax return you were supposed to enter the amount of advance child tax credit payments you received between July 2021 and December 2021. If you did not enter those payments or entered the amount incorrectly, that is why the IRS is recalculating your refund / tax due. Check your bank records for that period of time to see if you received more than you said you got on your tax return.
And look at your online account with the IRS to see what the IRS says they sent to you.
https://www.irs.gov/payments/your-online-account
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
