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Idaho State Tax Commission fax number
(208) 334-5364
Tax Administration
Used for: Submitting Idaho Business Registration (IBR-1) forms and Multistate Power of Attorney (M-POA) forms; Public Records Requests per ISTC guidelines.
Fax destination details
- Department
- Tax Administration
- Purpose
- Submitting Idaho Business Registration (IBR-1) forms and Multistate Power of Attorney (M-POA) forms; Public Records Requests per ISTC guidelines.
- Form
- IBR-1 — Idaho Business Registration Form
- Address
- 11321 W Chinden Blvd, Boise, ID 83714
- Voice phone
- (208) 334-7660
- Website
- Visit organization website
Before you send
- Confirm that this exact department handles your document or request.
- Check the organization website or call its main line for the current fax number.
- Include a cover sheet and any case, member, claim, or form reference required.
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Fax to: 208-334-5364. Return to: Idaho Business Registration, PO Box 36, Boise, ID 83722-0410.
Official form instructions are published as a downloadable file on the organization's website.
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