Preparing your Business activity statement (BAS). Find out how to complete the business activity statement (BAS) labels for: 1  Goods and services tax (GST). 2  Pay as you go (PAYG) income tax instalment. 3  Pay as you go (PAYG) tax withheld.4  Fringe benefits tax (FBT) instalment. 5  Luxury car tax (LCT). 6  Wine equalisation tax (WET). 7  Fuel tax credits.reparing your Business activity statement (BAS). Find out how to complete the business activity statement (BAS) labels for: 1  Goods and services tax (GST). 2  Pay as you go (PAYG) income tax instalment. 3  Pay as you go (PAYG) tax withheld.