Pins & Filing

I contacted the IRS the other day (thru ID.me) and received a new 6 digit pin. I understand that this pin must go with each return. If this is the case then why would there be a need for a self created 5 digit pin? How do I remove that 5 digit pin from my returns.

 

Secondly I am receiving rejections when submitting 2022 returns because 2021 returns were incorrect, I am amending 2021 but have not yet submitted them. I understand 2021 cannot be e-filed and have to be mailed. As long as the IRS 6 digit pin is on 2021 (to be mailed) and 2022 (trying to e-file) there should be no problem?

 

1 more question. I have been trying to use both Chrome then Edge (or visa versa) with no luck. Is one better to use than the other?

 

An aggravating multi-tier dilemma . . .