Other tracking software just use the balance API of an exchange to show the current balance (like we do it on the Exchange Balance page).
However, this is not how CoinTracking is intended to work.
In order to get a tax compliant gain calculation, our system needs all your transactions and calculates the balances based on it.
Please ensure that all your transaction are listed correctly in CoinTracking.
Follow the Import FAQ in order to import your transactions correctly.
For a perfect tax calculation it is not even necessary that your balances are correct, because "General Deposits and Withdrawals" do not have any influence on the gains results.