Several Lockbox Addresses Closing in 2022

IRS is closing several individual payment P.O. boxes, also known as Lockbox addresses, in the San Francisco, CA and Hartford, CT areas as of January 1, 2022. Payments mailed to these payment locations after that date will be returned to sender. Get details here.
Please check IRS' Where to File page for active addresses before mailing payments, and see Publication 3891, Lockbox Addresses for 2021 for more information.