Checking out with Google Wallet

I’ve setup a new Google Merchant Account for a nonprofit client to be able to accept donations, and the dashboard is at http://www.google.com/merchants/merchantdashboard. When I go to http://www.google.com/merchants/basicsettings, I can confirm that the website URL is verified.

I can also visit https://wallet.google.com/merchant, and click on Merchant Settings, and view the Google Wallet Merchant ID.

However, after entering the Merchant ID into the SCABN Settings page on the website and then setting up a product and checkout page (http://cefchattanooga.org/donate-test), the Google Checkout button never appears after adding an item to the cart.

I’m trying to figure out if there’s anything I’m missing, and what – if anything – I’m doing wrong.

I do see this notice on the Google Wallet Merchant Settings page:
“Tax information required
Tax regulations in the US require that Google have complete and accurate tax information for our customers. Such forms are required in the event that a payee is located in the US or whose content is sold in the US. Please update your tax information in order to get paid.”

…. is this required before Google’s API will provide the Checkout button? Any other ideas?

https://wordpress.org/plugins/simple-cart-buy-now/