Attaché Payroll calculates Tax based on tax scales that are applied to each Employee Masterfile, based on standard formulas in line with the ATO. See: https://www.ato.gov.au/rates/schedule-1---statement-of-formulas-for-calculating-amounts-to-be-withheld/
Working Example of a tax calculation
The example below shows how tax calculates using Tax Scale 2 for an employee that has this scale applied to their Employee Masterfile:
Weekly Earnings Co-Efficient Co-Efficient
(X) less than A B
$2307.0000 multiplied by 0.3450 minus 182.7504
In an employee's timesheet (Payroll, Transactions, Timesheets, Create or modify):
In the example above, the employee earned $1324.00 gross a week.
From Setups, Payroll, Tax Scales, Enquire, you can check Tax scale 2
Using line 7 on the tax scale for Tax-free Threshold Claimed. Weekly Earnings.
To calculate the tax: ($1324.80 x 0.3450 ) - 182.7504 = $274.3056 which will round to $274.00 TAX.