Hi Rachel,
Firstly I think that the web browser version of AccountRight is ver limiting
Personally , as annoying as it is with the constant updates I access MYOB from the software downloads
This you can do from any computer wit internet access and you get what you pay for.
Anyway
I would deal with the transaction outside of bank feeds
Apply the credit through customer returns to the appropraite invoice and then you should be able to match through bank feeds,
I don't think you can enter a negative amount in an invoice in the web browser so I hope this works for you
Lisa