TurboTax does not mail your tax return for you. You have to print, sign and mail it yourself if you chose to file by mail.
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.
If at all possible, use a mailing service that will track it so you will know the IRS received it. It will take longer than usual for the IRS to process your return
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.
Per the IRS website IRS Operations During COVID-19: Mission-critical functions continue: The IRS is not currently able to process individual paper tax returns. If you already have filed via paper but it has not yet been processed, do not file a second tax return or write to the IRS to inquire about the status of your return or your economic impact payment. Paper returns will be processed once processing centers are able to
Later......you can check the status on the IRS site. https://www.irs.gov/refunds
State returns have to be mailed to the state.