US rebate credit memo without tax

Hi experts,

I have a issue for US rebate settlement. Almost all US states do not allow tax credit, so in our rebate credit memoes, we should not pay tax to the cusomter. Currently, our user remove the tax classification indicator in credit memo request every time to make sure there will be no tax in credit memo. Now user have a request to make default to no tax for all US rebate settlement.

Actually, tax classifiction indicator is the standard SAP solution to control the tax, but our user do not want to do it manually every time. We can remove all tax condition types in our rebate pricing procedure and then there will be no tax at all. However, there is a risk that 1 or 2 states allow tax credit.

Does any one have same experience? Is any other better way to satisfy this requirement?

Thanks in advance,

DL