USPS is doing another round of COVID-19 test kits! Get ’em for free here.
Additionally, your local pharmacy can supply you with up to 8 free test kits (That’s 4 Binax boxes, for example) within a rolling 30 day period on MOST insurances (Anthem tends to prefer you to purchase kits outright, and then submit the receipt). You can either check their website, or go in and ask, and they’ll be able to handle that for you. Just remember to be patient, pharmacy people are very tired and frazzled right now!