ALL things that require human attention are WAYYYY behind in processing due to the covid situation ... don't be surprised if they have not even opened your envelope yet and have no record of the filing yet when you call ...
To check the status of your ITIN, you can call the IRS toll-free at 800-829-1040 if you are in the United States or 267-941-1000 (not a toll-free number) if you are outside the United States.
