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.
@ianputman1994 as noted by others, assume it'll be 6-9 months from the time you filed until your paper return is processed. The IRS just began processing the returns received in Feb last week (the IRS processes in the order received)
so best to just be patient
here is what the IRS webstite states
How long you may have to wait: The IRS understands the importance of timely processing of tax returns and refund issuance. We have processed all error free returns received prior to December 2021 and continue to work the returns that need to be manually reviewed due to errors. We are continuing to reroute tax returns and taxpayer correspondence from locations that are behind to locations where more staff is available, and we are taking other actions to minimize any delays. Tax returns are opened and processed in the order received. As the return is processed, whether it was filed electronically or on paper, it may be delayed because it has a mistake including errors concerning the Recovery Rebate Credit and the Child Tax Credit, is missing information, or there is suspected identity theft or fraud. If we can fix it without contacting you, we will. If we need more information or need you to verify that it was you who sent the tax return, we will write you a letter. The resolution of these issues could take 90 to 120 days depending on how quickly and accurately you respond, and the ability of IRS staff trained and working under social distancing requirements to complete the processing of your return.
What you should do: In most instances, no further action is needed but you may check Where’s My Refund? or you can view your account. If you filed electronically and received an acknowledgement, you do not need to take any further action other than promptly responding to any requests for information. If you filed on paper, check Where’s My Refund? If it tells you we have received your return or are processing or reviewing it, we are processing your return, but it may be under review. If you filed before October 2021 and Where’s My Refund? does not have any information, your return has been opened but work on it has not begun. We’re working hard to get through the carryover inventory.
Please don’t file a second tax return or contact the IRS about the status of your return.