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The features required by Inland Revenue Authority of Singapore (IRAS) to implement Goods and Services Tax (GST) related components are installed by simply inserting the word sg-iras in the comma-separated list of Custom Features in the target business. To do this, go to
System Administration » Business, Modules and Models
from the Home page, insert sg-iras in Custom Features and click on Update.
The tax table defines the tax structure of the business by defining the tax components, rates, codes, accounts, etc., depending on Tax Scope, an attribute of affected entity (Customer or Supplier) and Tax Category, an attribute of the item being supplied or purchased.
Once you have set sg-iras in the Custom Features, the Tax Table along with the related codes are automatically preloaded. Any predefined tax table entries will be totally replaced by the auto-loader.
So, when you go to
Cross Application » Settings
and click on the Tax Table tab, you will see
Select row, enter appropriate GST account code (if already defined in the Chart of Accounts) and click on Update to save.