Calculating Sales Tax Script?

i created invoice in livecycle designer.  have 2 checkboxes "yes" or "no" when comes whether or not sales tax applies.  have idea if expression it's not working @ all.  once typed if expression, sales tax field blank.  before added checkboxes or if expression, field working (subtotal*taxrate).  named each field individually checkboxes.

 

i need have allow situation when sales tax doesn't apply , of customers not charge sales tax.  need figuring out script best use or how make work.  also, write script?  under calculate?

 

the script wrote was:

 

if yes_1 = "yes" (subtotal*taxrate)

     else salestax = 0 endif

if yes_2 = "yes" (subtotal*tax rate)

     else salestax = 0 endif

 

can me please?!

 

thanks

 

rachel

step on graphics, llc

it not working because syntax incorrect. put calculate event of salestax field (in formcalc):

 

if (yes_1 == 1 or yes_2 == 1) then

$ = subtotal * taxrate

else $ = 0

endif

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