You must tell the Tax Office if you have ceased trading or your business has been sold. You must also cancel your various registrations, such as Australian Business Number; Goods and Services Tax; Luxury Car Tax; Wine Equalisation Tax; Pay As You Go; or Diesel and Alternative Fuel Grant Schemes.

Keep your details up-to-date to make sure that any activity statements the Tax Office sends you reflect your current situation. All activity statements that are sent to you must be lodged - even if this is a 'nil' report because you have not traded in that period - and paid by the due date.