1. Go to Setting > Financial Setting
  2. Find a section named Sales & Service Tax (SST). Tick the checkbox 'Activate SST'
  3. Select Cash basis for the Tax Basis option.
  4. Enter your SST Registration number.
  5. Enter the label of the number, in this case you can name it as 'SST No.'
  6. Enter the start date for your SST to commence.
  7. Select the appropriate Tax Period according to the letter you received from the RMCD.
  8. Lastly, scroll to the bottom and click Save.

This will kick start the system to generate the necessary tax rate for the SST regime. 

Effect on Sales Invoice & Purchase Invoice

The Sales Invoice and Purchase Invoice will be automatically set to have tax enabled calculation. Previously it is set to Amounts are 'No Tax'.