What is your Calculation like?
Maybe you have wrong settings in procent of VAT.
You haven't shown us the calculation that you use. I use 2 calculations for calculating the VAT. The first calculates the VAT from the total amount and the second calculates the VAT over the amount:
Let ( [
amt = 34.92 ; // Your example-amount
perc = 20.5 // The VAT percentage I suspect you used
Round ( amt - amt/(1+perc/100) ; 2 ) ; // calculates the VAT FROM the total amount
Round ( amt * perc/100 ; 2 ) ) // calculates the VAT OVER the amount to be added
The answer from this particular example will be:
I suppose that your calculation is similar to the first one.