I am trying to use the following to get difference of dates in Quarters and the formula will not resolve as function is not supported in the nintex forms.
=FLOOR(((YEAR([date2])*12+MONTH([date2]))-(YEAR([date1])*12+MONTH([date1])))/3,1)
This works in the Sharepoint List side but not on the Nintex form. Any guidance is appreciated.

