- Taxpayer self-service portal
- Idaho Business Registration (sales/use/withholding permit application)
- Business income tax e-file
- IFTA license application
- IFTA license renewals and decal reorders
- IFTA return e-file
- Fuel distributor validation Taxpayer Access Point (TAP) allows fuel distributors to validate suppliers' and customers' identities. You must register with TAP and be logged in to access this confidential information.