Congress mustered rare bipartisan support for the Postal Service package, dropping some of the more controversial proposals to settle on core ways to save the service and ensure its future operations.
The at-home tests are expected to be delivered by USPS later this month. The White House said the site is in "beta testing" and will be launched formally Wednesday.
Most post offices that don't meet their costs are in rural areas, but Congress has blocked them from being closed. Democrats like Alexandria Ocasio-Cortez say postal banking might offer a solution.
If you haven't ordered gifts online yet, it may be too late to get them delivered by Christmas. More consumers are shopping online this year, and extra holiday demand is exceeding delivery capacity.
A record volume of election mail has moved through the U.S. Postal Service ahead of Election Day. And while there have been some delays, experts say voting by mail has gone relatively smoothly so far.
Ron Stroman resigned shortly before Louis DeJoy took over the Postal Service. Stroman says that changes underway should be halted if their effect is to slow mail and disenfranchise voters.