Zamp

California Portal Access Instructions

How to add filing@zamp.com as an MFA email on state tax portals (AL, CO, GA, and 20+ other states) so Zamp can file for you.

Multi-state Portal Access Instructions

How to add filing@zamp.com as an additional email in your Washington My DOR account so Zamp can file on your behalf.

Washington Portal Access Instructions

Directory of official state tax filing portal login links for all US states with sales tax plus DC.

State Tax Filing Portal Links

State Resources

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