The federal government’s website where Americans can go to order 4 free at-home rapid COVID-19 testing kits is now up and running.

Americans are encouraged to order the tests for future use, “when you need them.” The test kits will ship in 7-12 days via the USPS, so if you need a test more quickly you’ll need to visit a local testing center or pick one up at your local pharmacy.

Clicking “order free at-home tests” on the website will take users to a U.S. Postal Service website where they can place an order. The only information needed to place an order is your name and address, but users can add their email address to get updates on their order.

The White House said Friday, Jan. 14, that it had 420 million tests under contract and that it will continue awarding contracts to additional manufacturers “over the coming weeks.”

The tests being sent through the program are all rapid antigen tests authorized by the U.S. Food and Drug Administration. People who order them will not be able to choose which brand of test they receive.

You can skip visiting the official site and go direct to the United States Postal Service where they handle shipping. Place Your Order for Free COVID-19 Tests here.