TAX Amount calculation

Hello,

I have the following data:

Debit: account 1: 6118,59

Debit: tax account: 581,41

Credit: account 2: 6700

I'd like to understand how the Tax is calculated. The tax code selected has the percentage 10,5.

In the additional data related to the account 2 the field Disc. base is 5.537,18 (SKFBT).

It seems that the tax amount is calculated on the amount 5.537,18 (Disc. Base). How it is possible? The calculation is correct?

Thanks a lot

Cheers,

Emanuela