IRS address

As of right now, I am preparing to mail out my tax return that I filed with TurboTax and cover letter explaining the reason why I completed nonfiler registration to get stimulus check. However, I am confused which address I should use to send my return. Since I filed 1040 tax return with cover letter, not 1040X.

In addition, i live in Pennsylvania. 

Please help!

 

Thank you in advance!

 

 

sara s