Idaho Return Mailing Addresses
When filing your Idaho state income tax return, it is important to use the correct mailing address to ensure timely processing. Below are the official mailing addresses for various Idaho tax forms.
General Mailing Address for Idaho State Tax Returns
For most individual income tax returns, including Form 40 and Form 43, mail your return to:
- Tax Research
- Idaho State Tax Commission
- PO Box 36
- Boise, ID 83722-0410
Specific Forms and Mailing Instructions
Some forms may have specific instructions or additional requirements. For example:
- Form 89SE: This form requires you to mail the original to the address listed above. Ensure you include the project end date (not later than December 31, 2030) and site addresses.
- Form ID K-1: If you are an individual owner required to file this form, follow the supplemental instructions provided in the form’s guidelines.
Important Notes
- Always check the official Idaho State Tax Commission website for the most current instructions.
- Do not staple your return unless specifically instructed.
- If you are filing an amended return, check the form for specific instructions (e.g., Form 40 includes an "Amended Return?" checkbox).
Source:
Form 89SE
Form ID K-1
Form 40
Form 43
Idaho State Instructions
Disclaimer: Always verify information with the official Federal or State Department of Revenue Forms and Instructions.