How Do I Fix the Xero Error "Account code or ID must be specified?"

This Xero error typically occurs when an income account does not exist for one or more of your invoice line items.

To resolve this issue, you can do one of the following:

1. Set a default income account: Go to Xero > Settings & Tools and select a default income account to use when one cannot be found on a product level.

2. Specify an income account for each product: Make sure that you have specified a valid income account for each product in your Recurly database. You can do this under the "Accounting" section of a product’s edit screen.

Note: If you used a previous accounting integration with Recurly and have old income account codes specified on products, you may also receive this error.