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Avalara Help Center

Avalara Vendor Form and W-9

A copy of Avalara's W-9 for 2019 is now available.

Corporate office address

Avalara, Inc.
255 S. King St.
Suite 1800
Seattle, WA 98104
Corporate Website:

Corporate phone number

(206) 826-4900



Federal Tax ID

# 91-1995935
C Corporation 


Scott McFarlane


William (Bill) Ingram

Payments and payment method:

Your Customer Account Manager (CAM) will send you a link from Sertifi, Inc. in order to complete your payment information and verification. 

Accounts receivable

Payment terms

Avalara’s payment terms are outlined in your contract.

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