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Tax Codes & GST Configuration

Structured Tax Configuration with Built-In Calculation Logic
Manage GST, VAT, SST, and Sales Tax with controlled calculation methods, reporting basis options, and structured tax code governance.
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Tax Codes & GST Configuration

What This Module Covers

Tax code management, default tax behaviour, GST calculation methods, tax-inclusive and exclusive logic, accrual and cash basis reporting, reverse charge configuration, and rounding difference control.
Tax Code Management
GST, VAT, SST, and Sales Tax codes can be set up and activated for sales and expenses separately.
Only selected tax codes will appear during data entry. Each tax code includes guidance explaining how it functions within reporting.
The GST / SST / VAT payable amount is recorded under account code 2-4000 GST Payables.
Tax Code Management
GST Calculation Method
When a tax invoice contains multiple standard-rated items, two calculation methods are supported:
  • Item-by-item method
  • Subtotal method
Both methods are acceptable. If differences arise due to rounding, the system automatically posts the variance into GST Rounding Difference. This logic applies when all taxable lines use the same GST rate and other lines are No Tax.
GST Calculation Method
Default Tax Setting (Exclusive & Inclusive)
The default tax option can be set to either:
  • Tax Exclusive
  • Tax Inclusive
When Tax Inclusive is selected, new sales or expense transactions will default to inclusive tax treatment. Existing transactions are not affected.
Default Tax Setting (Exclusive & Inclusive)

Understand How Tax Logic Connects to Financial Reports

See how tax codes, calculation methods, and reporting basis affect GST reports and balance sheet outcomes.
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Transactions Flow

Accurate Tax Logic, Built Into Your Accounting

Configure GST and tax codes with structured calculation and reporting control.
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Frequently Asked Questions

Does AI Account support different tax types?
Yes. GST, VAT, SST, and Sales Tax are supported with separate sales and expense tax codes.
Yes. Both item-level and subtotal-based GST calculation methods are available.
Yes. GST reports can be generated on both bases.
Rounding differences are calculated automatically and can be adjusted where required.