I would definitely call the IRS because it could be that someone else used your social to file for 2021 either by mistake or for fraudulent reasons. The phone lines will be crowded today too. If you have access to your IRS online account or have not set one up yet then I'd try to go in there too. It will show you all the filings made under your TIN. Here is the link to login or signup:
https://www.irs.gov/payments/your-online-account
