"How do you change accounts if a sales receipt is hitting the wrong revenue account? It is first going into Undeposited funds and then on to the rev. account."
When you create a Sales Receipt, you use the Product/Service Item code and that item code is mapped to the Income Account. If you want to change the income account, go the products/service tab, edit your item and change the Income Account to the account you want.
(Left Dashboard > Sales > Products/Services > Select products/services item to edit > Change the Income Account > Save).
"It is first going into Undeposited funds and then on to the rev. account."
It's part of the same one transaction. There is no first and second when recording the sales receipt.
You can open the Sales Receipt on screen and click MORE at the bottom and select the Transaction Journal. You will see it's one transaction.