For steps on how to download transactions from most NZ banks, see the Downloading Bank Statements page.
The Graph only shows items that contribute to your profit.
An incorrect bank balance happens because the data hasn’t been reconciled to the bank correctly. It is up to you to check that the opening balance is correct and that the bank balance is correct after each bank statement import (or after entering any transactions manually).
You should enter any GST paid to customs as a transaction in the cashbook with a GST rate of 100%. It doesn’t matter whether you enter this as one line in the cashbook, or whether it’s part of a “split” transaction.
You could have your GST Return type set to “Invoice Basis”. This means that it will use the date of the Invoice rather than the date in the cashbook. We recommend that where possible companies use “Payments Basis” because it is a lot easier to use