Illinois Form IL-56 fax number (fiduciary notice)
Where to fax Form IL-56, Notice of Fiduciary Relationship, to the Illinois Department of Revenue.
Verified October 22, 2026Checked against Notice of Fiduciary Relationship (tax.illinois.gov).
| Who uses it | Office | Fax |
|---|---|---|
| Form IL-56 notices | IDOR power of attorney unit | 217 782-4217 |
Before you fax
- The page says to file IL-56 only when you must represent the taxpayer before IDOR or IDOR has asked for it.
- It can also be emailed to [email protected].
- Upload through MyTax IllinoisUse the IDOR Power of Attorney submission link in the Additional Services panel, as a single PDF file.