Sub-total calculator


Use this screen to "reverse calculate" sales tax amount from a total sale amount


The subtotal calculator will re-calculate the total of a payment received to separate the tax paid from the total invoice amount.


To bring up the subtotal calculator screen, navigate Tools -> SubCalc




The subtotal calculator screen will appear:




To use this form:




If you need to change the sales tax rate, overtype the amount in the TAX RATE entry field and, if you've already entered the total sale amount in the ENTER TOTAL field, then click CALC


The TAX RATE value is saved between sessions. If you change this value, the new value will be remembered from session to session.