After you file

TurboTax for 2021 will produce the PPP forgiveness loan statement.  To enter the information regarding your PPP loan forgiveness, go to Wages & Income, then scroll down the page and find the Less Common Income section.  At the bottom of the Less Common Income section, select Miscellaneous Income.  On the next page, you will see an option for Forgiveness of PPP loans.  Select Forgiveness of PPP loans and respond to the questions when prompted.

Here is a picture of the top part of the Statement we produced in our test return.  

per @GeorgeM777