How to create tax only credit invoice in PeopleSoft Billing?

We were in PeopleSoft 9.1 and our business need is to do "tax-only credit" comes as a result of having to adjust ("wash-out") a previously imposed tax because at the time of the original transaction, statutorily and systematically, there wasn’t a supportable reason to exempt the original sale.

As part of workaround, our business process of refunding sales tax charged or removing the tax from the accounts receivable customer account is to credit the original transaction and create a “re-bill” document that is free of sales tax. Operationally, this is a very labor intensive process and must be coordinated with the creation of a tax exemption that applies the correct calculation of tax. This method of adjusting tax liabilities can often result in the sales tax burden becoming a cost to the