Refund applied to wrong account. Included on VAT return that has been sent.

Hi there,

I'm not sure how to deal with this. A customer accidentally double paid an invoice back in August. A refund was arranged in September and was completed 30/09/20.

The bank statement that included the refund was explained, but the refund was mistakenly applied to an incorrect account. The VAT return has already been processed and sent.

This is the state of the two accounts:

Account 1 has an invoice that is marked as an over-payment of around £264, due to be refunded. Account 2 has an SRF on it, paid using Account 1's £264 refund.

So,

1. I need to remove/reverse the SRF on Account 2. It is unrelated to this account.
2. Instead, I need to use the £264 to refund the over-payment invoice in Account 1.

How can I accomplish the 2 points above?

Thanks