Tax calculations in general are dependent to each jurisdiction or tax regulation the customer is bound to. Therefor it might not be possible to include every detail in the calculations of your personal tax. The categorization of different tax groups for your trading accounts will enable varying taxation setups though. It is possible to input divers settings to accounts for complex scenarios such as different yearly compensation mechanisms for stock and forward deals or tax exemption limits. So far general tax calculations, e.g. tax pools compensation, are based on the current german tax regulations. If your automatic tax calculation is incorrect, there is always the possibility to enter a manual tax value for every trade, dividend and interest payment which will take precedence over the automatic calculated tax values. The tax pools will not be affected of a manual tax value though.