ATO for Activity Statements (PAYGW and GST etc.):
Updated Advice from the ATO (30 January):All Quarterly Activity Statements for Sept '19, Dec. '19 and March '20 aswell as all monthly Activity Statements form October '19 through to April '20 have until 28 May 2020 to lodge (and then pay or arrange payment). Note it is for the listed impacted postcodes or by arrangement and discussion with the ATO.
Complete Bookkeeper impact strategy - ICB Resource