I filed my 2020 tax return with Turbo Tax. I didn't have my pin from the IRS then. I have the papers from T T saying it was filed. Do I need to do anything?

Was your e-file accepted or rejected?   If it was accepted you do not have to do anything else except wait for the IRS to process your return.

 

First, check your e-file status to see if your return was accepted: 

https://turbotax.intuit.com/tax-tools/efile-status-lookup/

 

Once your federal return has been accepted by the IRS, only the IRS has any control.  TurboTax does not receive any updates from the IRS. Your ONLY source of information about your refund now is the IRS.

 

You need your filing status, your Social Security number and the exact amount  (line 35a of your 2021 Form 1040) of your federal refund to track your Federal refund:   

https://www.irs.gov/refunds

To track your state refund:    

https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund

 

https://ttlc.intuit.com/questions/1901548-why-do-some-refunds-take-longer-than-others

If you chose to have your TurboTax fees deducted from your federal refund, that will take some extra time, while the third party bank handles the refund processing.

https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions

https://ttlc.intuit.com/questions/2840013-does-accepted-mean-my-refund-is-approved

https://ttlc.intuit.com/questions/2724106-my-return-is-accepted-but-still-not-approved-is-there-a-problem-should-i-be-worried

When they issue a IP PIN in January of 2022 you are to use it for any/all returns you file during 2022 no matter which tax years they are for.   So if you file the 2020 return back in 2021  you will not use the 2022 IP PIN on an already filed return.   Read that notice again carefully to see exactly what/when you need to use it.   Next year, in Jan 2023, they will mail you a new IP PIN to use for any/all returns you file in 2023.