If you have your business tax payments set to auto-pilot, check those addresses: The IRS is closing business payment P.O. Boxes in the Cincinnati and Hartford areas beginning July 1.
Payments mailed to a closed payment location will be returned to the sender. To help ensure timely receipt, check Where to File before mailing in a payment.
To keep things simple, you can also use IRS Direct Pay to pay a tax bill or estimated tax payment directly from a checking or savings account.