Turbo tax inserted a pin for filing my 2020 taxes WHERE DID IT COME FROM?

Hi,

I noticed that Turbo Tax inserted a pin for filing my taxes electronically. I never received a pin from the IRS, so I don't know where the one used comes from. I tried calling but there are no live agents to help.

I don't want my taxes to be rejected because of this pin. I was wondering if it is necessary or if I should just erase it. I cannot remember if last year was there or not.  So, Please someone shed light on this subject.  Thank you very much.

DH