If it is the opening balances last year that are incorrect, either you can have the opening balances adjusted by a support consultant via PCC directly in the database, or you can raise entries into first period of last year to bring your balances inline with theirs. Check your TB against theirs - the total DR and Cr differences (and retained earnings) on the balance sheet should be equal. Raise the differences via general journal on the first day of the previous year bringing last years TB into balance.