Tax entered incorrect

Question

hi,
in FB50, if i click calculate tax button without check calculate taxes on net amount in editing options,
dr 100
cr 100 with tax code
then it is
dr 100
cr   95 with tax code
cr    5 this is automatically giving by system as input tax account
but if i choose calculate taxes on net amount in editing options,
how can i get the below? i always get tax entered incorrect although the tax percentage is correct which is 5%.
i manually change the credit to 105 but the system doesn't seem to auto create additional credit item with value 5. what should i do?
dr 100
cr 105
cr   5
thanks

Answer 1

If you choose calculate tax on net amount, you will make following entries:
debit: 105
credit: 100
And system will calculate 5 by multiplying credit amount with percentage...
If you don't choose this you will enter:
debit: 105
credit: 105
And system will calculate 5 according to formula 100*tax rate/100+tax rate and posts:
debit:105
credit: 100
tax:5
You get same result. But, what you want to achive I think is not possible automaticaly, but you would need to post directly on tax account.
regards