In your AdThrive dashboard, click Payments in the left sidebar, then Payment Info. There, you can update your contact details, choose a payment method, enter your payment account information, and submit a new tax form.
You can edit your tax information on the third tab of the Payment Info page:
Click through until you see this page!
What if I have more than one site with AdThrive?
If you have more than one site with AdThrive, you will need to update your account information for each site separately. Select the site you want to update from the dropdown menu, then navigate to your Payment Info page to update your address/payment/tax info for that particular site.