Thailand Revenue Department Updates VAT Return Form (Por.Por.30) Effective 1 March 2026

Thailand’s Revenue Department has announced an update to the monthly VAT Return Form (Por.Por.30) and its supplementary attachment (detailing output and input tax of each branch) that will be effective from 1 March 2026.   

Key changes  

• Additional address details for VAT registrants to ensure data accuracy and identification of each establishment. 
• Enhanced tax computation section, including new fields to support supplementary filings and clearer breakdowns of tax amounts for each item. 
• Tax refund via Prompt Pay as the main refund channel, allowing for faster and more secure refund processing. 
• Revisions to the supplementary attachment to add more details when reporting changes in revenues and purchases in case of supplementary filings. ,