| Answer | Crossword Clue |
|---|---|
| MAILIN | Submit via a stamped envelope |
| MAILED | Sent in a stamped envelope |
| MAILS | Sends in a stamped envelope |
| RETURNMAIL | What a self-addressed stamped envelope comes by |
| backstamp | a mark stamped on the back of an envelope / to mark with a backstamp |
| EFILE | Submit a tax return via computer |
| EFILE | Submit a tax return via the Internet |
