Tax Calculation Plugin Error

When adding items to a transaction via a User Event Script or using Add Multiple in the UI, the HSN Code is not automatically sourced. This is a known limitation and considered an enhancement request.

Attempting to manually set the HSN Code within a User Event Script and then saving the record will result in the following error:

“Tax Calculation Plugin error: No applicable tax rule was found for this transaction.”

Solution: Suitelet-Based HSN Code Assignment

To resolve this, implement the following approach:

1. Use a custom flag field on the record to control the flow.
2. In the afterSubmit event of the User Event Script, invoke a Suitelet to set the HSN Code. Unlike User Event Scripts, Suitelets can successfully update the HSN Code without triggering the tax plugin error.
3. The flag helps prevent infinite loops:

• The Suitelet sets the flag to true after updating the HSN Code.
• In the beforeLoad event, reset the flag to false whenever the record is edited manually.

This ensures the HSN Code is set correctly while maintaining system stability and avoiding recursive execution.