Effective immediately, every home in the U.S. is eligible to order 4 free at-home COVID-19 tests. The tests are completely free.
Orders will usually ship in 7-12 days. Order your tests now so you have them when you need them: https://www.covidtests.gov/
You can access the direct link to the USPS site (currently only available to residential households, orders will ship free starting in late January): https://special.usps.com/testkits