For anyone interested, ordering free at-home COVID-19 tests resumed on September 25, 2023. Households in the United States are limited to one order per residential address. Each order contains four individual tests shipped in one package. If you haven't placed an order since September 2023, you are eligible for two orders for a total of eight individual tests. To receive eight tests, you need to submit two separate orders.
Here is the link: https://special.usps.com/testkits