Related Clues:
- Group well-known for their spring collection
- Return addressee, briefly?
- E-File destination
- Org. whose roots go back to the Civil War
- 1040-issuing org
- Tax org
- With 3-Down, many a tax auditor
- E-mail mailer
- Auditor's org
- Gp. with a complicated code
- Email field
- Grp. with a complex code
- Its Web site has a ''Where's my refund?'' page
- Org. concerned with the word spelled by the starts of 18-, 24-, 36-, 54- and 59-Across
- Tax-collecting org