A tax clearance certificate, also known as a “letter of good standing,” confirms that a business has filed and paid in full all their taxes as administered by the Idaho State Tax Commission. Any existing business can request this certificate.
Requesting a certificate
You must make your request in writing. Include the following information:
- Business name
- Federal Employer Identification Number (EIN)
- Full address
- Name, title, and signature of the authorized representative making the request
- Fax number, mailing address, or email* address where you want us to send your certificate to
Send your written request to:
Tax Clearance Certificate
Idaho State Tax Commission
PO Box 36
Boise ID 83722-0410
Please allow 30 days for a written response. We’ll contact you if we have any questions about your request.
*You acknowledge that you accept any security risks involved in electronic communications if you choose to have the Tax Commission send the certificate to you by email.
Requesting a certificate be sent to a third party
You can have your certificate sent to a third party. To do this, write the request as instructed above. You’ll also need to complete a 
Form STC-06 – Request for Copies of Idaho Tax Returns.
- Complete the form through the “Requested Documents” section.
- In “Select Delivery Method,” complete the “Representative” section, including the third party you want your certificate sent to.
- Mail both your request letter and the completed Form STC-06 to the address listed above.
Note: If you’re buying an existing business, please read our Successors’ Liability Clearance Letter guide.