The ATO offices close for the festive season from 12.00pm Friday 22 December 2017 to 8.00am Tuesday 2 January 2018.
If you are planning on working during the office closure period, the ATO recommends that you check the System maintenance page for the latest planned maintenance information.
In terms of lodgements, the ATO will hold returns and forms not processed before the annual closure until processing resumes in 2018. Lodgments made after 7 December 2017 may not issue until the new year.
More information can be found here.