When my team duplicates a sales order to make a $0 replacement order based on it, even if they set all the line items to $0 and -Not Taxable- we can’t seem to clear out the tax total at the header level from the original order. Anyone familiar with how to fix this?

Is there a Recalc button on the SO on Edit mode?

Do you have the Override tax check box? We've had success with marking that.

Thanks for the help, I will look into these now.