Moved to Forum: Original Link
Essentially an Interest-free loan for up to 24 months. No supporting documentation was required - if you have a large amount of tax to pay, call them, tell them you're affected by the slow down and they will create interest-free payment plan for you on the spot. Good luck!
Mod: Deal doesn't meet Government Program Deal Posting Guidelines. Deemed as Social Services/Income Producing. Moved to forums.
They seem to be saying if you enter into a payment plan, their COVID-19 remission policy includes support which suspends interest:
https://www.ato.gov.au/General/COVID-19/COVID-19-frequently-…
Entering into a low interest payment plan
Question: What kind of low interest payment plan could I request?
Answer: We are currently able to consider payment arrangements where interest stops being charged going forward while the payment arrangement is in place. Your payment arrangement will still need to be something you are able to comply with and that is acceptable to us (in that you will be paying back your debt as soon as possible in the circumstances). Phone us so we can work with you to make sure the options we provide are suitable for your situation.
Also, your link states:
General interest charge (GIC) will accrue until the debt is paid.