Private Delivery Services
You can use certain private delivery services designated by the IRS to meet the “timely mailing as timely filing/paying” rule for tax returns and payments. These private delivery services include only the following.
DHL Express (DHL): DHL Same Day Service.
Federal Express (FedEx): FedEx Priority Overnight, FedEx Standard Overnight, FedEx 2Day, FedEx International Priority, and FedEx International First.
United Parcel Service (UPS): UPS Next Day Air, UPS Next Day Air Saver, UPS 2nd Day Air, UPS 2nd Day Air A.M., UPS Worldwide Express Plus, and UPS Worldwide Express.
For the IRS mailing address to use if you are using a private delivery service, go to IRS.gov and enter “private delivery service” in the search box.
The private delivery service can tell you how to get written proof of the mailing date.