Department of the Treasury Bureau of Fiscal Service announced the Bank of America Lockbox sites would cease operations for the IRS, effective December 31, 2020. Post office (PO) Box addresses for Individual taxpayers sending payments to Hartford, CT and San Francisco, CA for Form 1040, Form 4868, installment agreements (CPs 521/523), and 1040-Estimated Tax (ES) vouchers will be forwarded to Lockbox addresses in Louisville, KY and Cincinnati, OH. Permanent closure of the Hartford and San Francisco PO boxes will occur January 1, 2022 and any mail directed to those closed addresses beginning January 1, 2022 will be returned to the sender.
| If you filed forms… | Post Office Box |
|---|---|
| 1040 | P.O. Box 7704 San Francisco, CA 94120-7704 |
| 1040ES | P O Box 510000 San Francisco, CA 94151-5100 |
| 4868 | P O Box 7122 San Francisco, CA 94120-7122 |
| Installment Agreements | P O Box 7125 San Francisco, CA 94120-7125 |
| If you filed forms… | Post Office Box |
|---|---|
| 1040 | P.O. Box 37008 Hartford, CT 06176-7008 |
| 1040 |
P O box 37910 Hartford, CT 06176-7910 |
| 1040ES | P O Box 37007 Hartford, CT 06176-7007 |
| 4868 | P O Box 37009 Hartford, CT 06176-7009 |
| 4868 | P O Box 37911 Hartford, CT 06176-7911 |
| Installment Agreements | P O Box 37004 Hartford, CT 06176-7004 |
Current Post Office Box addresses can be found on IRS.gov and in the IRS Publication 3891 PDF, Lockbox Addresses for 2021; or, Where to File Paper Tax Returns With or Without a Payment.