Hello @Seller_ChtWsgG9cxF1x,

Thank you for reaching out. Welcome to Amazon Forums. You will want to contact Washington's sales and tax permit center to find out if you are required to have a sellers permit. Each state will have their own versions so please check.

What will be required for selling in the US for verification is as follows:

Important: If your identity document does not match the country of residence, make sure your proof of address matches the country of residence.

• Identity document: We accept ID documents such as passport, passport card, national identity card, driving license, enhanced driving license, citizenship card, permanent residency card, health card, or military identification card. Under certain circumstances and to meet our U.S. Law compliance obligations, we may request that you provide a specific type of identity document. We will communicate this need with you, if necessary.
• Make sure that your identity document meets the document requirements and the following criteria:
• Must be a government issued photo identity document which is recognized and issued by the country where you are a citizen or resident.
• Must show first and last name. The name must match the name entered under primary contact person information.
• Must include the date of birth. The date entered must be an exact match as we do not accept typos.

Also, as a new seller I highly recommend the following:

• Perfect Launch, Your First 90 Days
• Amazon Brand Registry

Please let me know if you have any additional questions.

Cheers,

Micah