Sales Tax Code or ID# If the List Button (to the right of this box) is missing then this field is for documentation only. For customers whom you do not charge tax, you may put their Reseller state sales tax ID here. If there is a List button then you have the sales Tax tables feature in Order entry. If you put a sales tax code here, the customer is by default taxable. If there is anything in the box that is 4 characters or less (other than NONE), it is treated as a tax code and will be used for the default tax code on a new O/E order. Anything greater than 4 characters is considered a Tax ID and is treated as non-taxable. The field is not checked here for validity.