After you file

Thank you very much @BillM223  - Amazingly helpful!

 

My last 2 quick follow-up questions:

 

1 - Should I send my Abatement Request to the CP501 letter address, or to the CP22A letter address? They are different. And also just to note, the CP501 letter did not include any instructions on how to reply, it only included payment options.

 

2 - There's no response deadline on the CP501 letter, just a payment deadline. I am assuming it's the same?

 

THANKS SO MUCH!!