Refunds not displaying tax line in AP invoice

Hello,

Customer is using EBS 12.2.10.

We are looking at introducing Refunds for Credit Memos in AR. When I create a credit memo that contains a line item and a tax item and then create the refund, the invoice that is created in AP only contains two line items - no tax lines. This means that the accounting is incorrect and we are having to explore the possibility of creating a manual journal as a work around.

Is this intended behaviour?

TIA