The Access Bio CareStart COVID-19 Antigen Home Test Kits shelf life has been extended from 12 - 15 months to 15 - 21 months by the FDA. Kits with the expiration date listed as February 2022 now expire on May 31, 2023.
This means tests are viable beyond the indicated expiration date on the package. You can confirm the extended expiration date of the kit you have by identifying the lot number, printed on the back of the box above the expiration date, in this table.