When you select the worksheet, you are required to select from the front entry screen the year on which the What-if estimate is to be based. Refer to PAYG (GDP-Adjusted Instalment Estimate) Worksheet
Year: Enter Yes at the required Year field to open the worksheet where you will see that the known amounts required for the calculation have been pre-filled. Alternatively you may click in the field and press [Enter] open the worksheet.
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