We've placed a restriction on our platform that prevents you from selecting certain due dates for your income tax payments:
1st week of the month: Days 1–7
Last week of the month: Last 5–6 days
These periods are blocked because they coincide with the time when IRAS notifies your bank about upcoming GIRO deductions.
To avoid any potential overlap or confusion with your existing GIRO arrangement, only the remaining dates within the month are available for selection as your income tax payment due date. This measure helps ensure smooth coordination and prevents duplicate or conflicting payments.