@Tina4224
First the IRS is still a few million 2020 returns behind for processing so yours may be in that stack if you mailed in the return correctly last year.
Now since this happened again this year I highly recommend you attach the form 14039 to your return to indicate this fraudulent claiming and then an IP PIN for the child will be issued for future tax years so this cannot happen again.
https://www.irs.gov/newsroom/when-to-file-a-form-14039-identity-theft-affidavit
