You might have noticed that some of the free COVID-19 at-home test kits sent out by the government are about to reach their expiration date. But officials said to hold off before you throw them out.Many of the COVID-19 tests approved by the Food and Drug Administration have extended expiration dates, so you might be able to still use them effectively after the expiration date that is printed on the box.The FDA said an extended expiration date means the manufacturer provided data showing that the shelf-life is longer than was known when the test was first authorized.RELATED STORY | FDA approves first at-home COVID and flu combination testTheres a full list of tests and their recommended expiration dates on the FDAs website, which officials said you should check before throwing an unused test away.If your tests lot number or expiration date is not on the list, or if the expiration date is listed as see box label, the FDA said you should adhere to the printed date on the box.You can still order free COVID-19 tests through the U.S. Department of Health and Human Services website. Every U.S. household is eligible to receive four free at-home test kits.RELATED STORY | Government to send free COVID tests; here is how to request themIf you need help ordering them or dont have access to the website, you can call 1-800-232-0233.