This field in the Maintain Tax Codes (MTX) window is the minimum sales amount subject to sales tax. Any sales amount less than this field are exempt from sales tax.
For example: You enter .12. Any sales amount less than $.12 is not subject to sales tax.
This field is numeric. You can enter up to two numbers plus a decimal. Valid entries are from 0 to .99. If you leave this blank, all sales are subject to sales tax.