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How to File a Thai Personal Income Tax Return Online with e-Filing

💡 Key takeaways

Organize income and tax documents first, select the form that matches your income, check deductions and withholding, and keep the submission reference and receipt.

Before starting an online tax return, organize your information instead of entering figures without knowing which types of income you have. Choose the form that fits your income and tax year, then compare income, withholding tax, and deductions with your actual documents.

Steps for Filing Online

  1. Go to the Revenue Department’s e-Filing system and register or sign in with the taxpayer’s account.
  2. Choose the tax year and the form that matches your income. For example, P.N.D. 90 applies to people with multiple types of income, while P.N.D. 91 applies to employment income under the form’s conditions.
  3. Check income using withholding certificates and payer documents, including any income that was not prefilled.
  4. Enter expenses, deductions, and tax already withheld using the actual records, and check eligibility requirements.
  5. Review the tax summary, refund account or payment method, and confirm only when the information is correct. Save the reference number and receipt.

Deadlines Depend on the Form and Tax Year

Annual and half-year tax forms have different filing periods, and online extensions may change each year. Check the Revenue Department’s filing deadlines and notices in the system before submitting. Do not rely on a deadline from an older article or tax year.

About the Associated Video

The associated video discusses general financial ideas such as inflation, debt, emergency savings, diversification, and DCA. It does not show the e-Filing interface or explain tax-filing steps. This page uses guidance and the official Revenue Department system.

Sources to Check: e-Filing system · Filing deadlines · 2026 personal income-tax forms

Scope: Tax forms, eligibility, and deadlines can change by tax year. Confirm current requirements with the Revenue Department before submitting.

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Kanngongkanngoen Editorial Team

We create clear educational content about personal finance, investing, and debt management, with an emphasis on accuracy and transparency.