Please make sure you switch to "Advanced View" before anything else (the floating right sidebar on every Zaxaa page).

First, go to: 

https://www.zaxaa.com/settings/payment_integration

and enter the required info for the payment processor/gateway you want to use.

Next, go to:
https://www.zaxaa.com/products

>> choose the product you want to do the test purchase on >> under the "Actions" column, click "Test Purchase" link (the "arrow pointing up" icon):

Note: All test purchase will not be saved as a transaction.

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