Did you have a refund or a payment due? If you owe money, you do not get any kind of notice. If you paid by check, you will see that your check was cashed.
The IRS is severely backlogged. If you are getting a refund, you could check Where's My Refund? on the IRS web site every month or so to see if there is any information. But don't be upset if it says it has no record of your tax return. That just means it's stuck in the backlog. Some refunds are taking as much as a year.
