The purchase from Aug 8, 2017 for:

$149.99 $7.50 - GST $12.00 - PST = $169.49 - Total

This amount I have just reconciled for period 5.

The $12.00 I had credited back on Credit Card Sept 12, 2017 - which will be reconciled in Period 6

- How do I enter this into SAP as Credit?