I have an unused COVID-19 test. Can I still register it? March 20, 2023 11:16 Updated Yes, you will be able to register a COVID-19 test that was purchased through your OnDemand account. Related articles How do I get a physician order for testing? What should I do if my sample is too thick to fill the dropper after 30 minutes? Is there a deadline to register and return COVID-19 test (At-Home Collection Kit) or COVID-19 + Flu + RSV Home Collection Kits? When will I receive my kit? When can I visit a Labcorp location for sample collection?