So that I understand the "Void" concept correctly, let's say that before Voiding a sample Invoice 4020 of 01/01/18, has a Quantity of 10 Widgets at $5.00 each, showing $50.00 in the total column, and has 5% Sales Tax of $2.50, for a grand total of $52.50. Once invoice 4020 is Voided, which items will be changed (to Zero?)?

If I need to preserve the Invoice as part of the customer record, so it shows what was done, and at what cost, including Sales Tax, could I use a Credit Memo of some type? If that was available, would there be any way to have the Sales Tax show up in the current Sales Tax Period as a credit?

If Voiding the Invoice would not preserve the details, I was thinking of going to the invoice before Voiding it and modifying each line item description to indicate the Quantity as well as the line item Total. Also I'd add a description at the bottom, with the original subtotal amount, the original Tax amount and the original Invoice total, all before Voiding it. Perhaps that would preserve all the info I'd need for any future review of the work done on the Invoice.

All ideas are welcome.