5. Service invoice has knock-off (paid) in Sept 2018, but service tax is not appear in SST-02 (period Sept- Oct 2018)

Reason:

Knock-off tax date will follow the customer payment date if user has tick on an invoice.

Change the customer payment date (eg. from 29/05/2019 to 29/09/2018), the knock-off date will remains unchanged.

Solution:

Change the Knock-off Tax Date (follow the payment date)