TurboTax is for personal use and is NOT used commercially.
Perhaps your local post office has a self-service machine in the lobby you can use after hours to send your previous years' returns.
You can also use UPS. You can print a label from the UPS website, attach it to your envelope, and just drop it in a UPS box. It's not certified, but you do have a tracking number.
@Sonic98
[Edited | 3/31/2020 | 7:08am PDT]
