It is taking much longer than normal for the IRS to process mailed returns. Eventually you should see something on the IRS site. TurboTax will never have any information about the return you mailed.
It can take 3-4 weeks (or longer since the IRS is backlogged) for anything to show up on the IRS site when you mail a tax return. Expect 6-8 weeks for complete processing of a mailed return.
If you mail a tax return (or a payment) to the IRS, it is a good idea to use a mailing service that will track it like UPS or certified mail so you will know it was received.
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s.
TurboTax will not know anything about your mailed return, and will continue to show “Ready to Mail” on your account. TurboTax will not know that you put your tax return in an envelope and took it to a mailbox. TurboTax does not get updates on mailed (or e-filed) returns.
When the IRS opens its mail and begins to process mailed returns you can check the status on the IRS site. https://www.irs.gov/refunds
State returns have to be mailed to the state.
See the commentary snippet below. With funding diminishing each year, the IRS just can't keep up:
The IRS continues to struggle with backlogs, telephone service issues, and hiring during the pandemic, according to its watchdog.
The agency still hadn't finished processing more than 2 million paper returns from last year as of March 20, and was suffering from a number of other work backlogs, the Treasury Inspector General for Tax Administration said in a report released Friday.