What is the calculation sheet method?
This is a step-by-step way of calculating the GST on your sales and purchases. Use the GST calculation worksheet for BAS (NAT 4203, PDF 58KB), which is available from the Tax Office, to complete labels G1 to G8 to work out your GST payable – G9. Complete labels G10 to G19 to work out your total GST credits – G20. (If you have nothing to report at a label – leave it blank.) Then follow the instructions on the worksheet to transfer the amounts to the appropriate labels on your activity statement. Do not send the GST calculation worksheet for BAS with your activity statement – just keep it with your records for at least 5 years. Extra copies of the GST calculation worksheet for BAS (NAT 4203) are available from by calling the Tax Office on 13 28 66.