The major issues that the Singapore user should take note are:
For Singapore user, if you do not need to automate your payroll, you still can use QuickBooks Payroll feature to record your payroll transaction.
Payroll feature by default is not turned on, to turn on Payroll feature in QuickBooks you need to go to the Edit menu and select Preferences feature. In the Preferences window, click the Payroll & Employees icon (on the left column of the preferences window), then click the Company Preferences tab. In the Company Preferences tab, select the radio button for “Full Payroll”. Click the “OK” button to complete the turning on of the payroll feature in QuickBooks.