If you believe this is incorrect you should contact your bank to verify the income details for your accounts. The bank should notify the ATO in writing if this information is not correct. You have 28 days to correct this information. However, if you have omitted the income, you will not need to contact the ATO. They will amend your return and send you a new assessment requesting payment of the additional tax, a general interest charge and, in some cases, penalties. If you require assistance with your communication with the ATO, One Minute Tax can help.