GST Optimizations

GST Optimizations

In order to improve GST performance we have made changes to the GST workflow.

Key Changes
  1. Once locked, the GST period cannot be unlocked.There are no more commit/uncommit buttons.
  2. Transactions that are created with a post date in a GST locked period, will be posted in the next GST period.
  3. Transaction that are edited in a GST locked period will have the differences posted in the next GST period.
  4. All reports can be generated regardless of GST lock status. You can generate F5 reports even if the the period is not locked.
  5. Reports will be generated based on selected period. This means you can generate reports cross multiple periods and even between locked and unlocked periods.
    1. Reports can only be generated 5 year prior to last lock period and 2 years into the future. 


As the GST Lock period cannot be undone, a new access control role has been created

'GST Admin'


Only users with this role can lock the period. 

    • Related Articles

    • Changes to GST Post

      To make changes inside a GST Locked period, you will have to enable the following setting: Once enabled, anyone may add/edit transactions within GST Locked period. You may consider setting Authorisation Password. Users will be prompted to enter a ...

    • GST API Frequently Asked Questions.

      GST Seamless Filing User Guide Link https://support.ocisystem.com/portal/en/kb/articles/gst-api-training-30-4-2024-1#GST_API_Training_Slides How can I ensure the system submission was sent successfully? You can log into the https://mytax.iras.gov.sg ...

    • GST API Role requirements.

      To use GST API the user will need the 'F5SUBMIT' role.  The role is needed to have the option to submit the F5 information to IRAS. Maintenance -> Access Control -> User (Cross Company)

    • GST Registered Company Setup

      Here are the steps users must do in SAM once GST-registered: Ensure GST Registered checkbox is ticked, and update the fields in this section Open "Document Setting Import" module and click on "Get Document". Once the list is populated, click ...

    • GST Payment or Refund from IRAS

      Amount Payable to IRAS Once you have completed checking of your GST transactions using F5 Detail report, you may generate the GST F5 report for your submission to IRAS. In this scenario, your company has to make a payment of S$19,965.87 to IRAS. The ...