BAS Lodgement Due Dates REPORTING AND DUE DATES BAS, IAS, SGC and STP * Pay Apr-Jun SGC by 30 June to be eligible to claim the expense in the same financial year income tax return * Pay Jun SGC by 30 June to be eligible to claim the expense in the same financial year income tax return If you need more information or require help to meet these deadlines, please call us on Source: Australian Taxation Officehttps://www.ato.gov.au/