I'm not exactly sure what you mean by re-assigning invoice numbers to bank deposits, do you mean changing the custom transaction invoice numbers?
You are able to change a setting within the system which will allow you to use custom invoice numbers.
I hope this answers your question, but please do reach back out to us if you needed further help or if this wasn't what you were looking for.
Thanks for your input on this thread.
If you have accidentally assigned money to the incorrect invoice you are able to undo this and essentially delete the receive payment transaction linked to the invoice.
You will need to locate the invoice in question and open it.
From there you will see that it should state the invoice as PAID, if you click on the payment link, then click on the date link, it will take you to the receive payment transaction.
You are then able to go to More (at the bottom), then select Delete if you wish to delete this specific deposit or payment that was used to pay the invoice.
The invoice should then be detached from that payment and the invoice re-opened.
I hope this sheds some light on what you need to do, reach back out if you're still not sure.