Referring to your email regarding the individual income tax return requested with total amount of 350,000 THB, I have received a letter from the Revenue Department of Thailand and they would ask me to submit the additional supporting documentation electronically using the E-Filer Attachment Function on Revenue Online as the lists below .
1) Original Certificate of Retirement Mutual Fund Unit Purchase (RMF)
2) Original Certificate of Long-Term Equity Fund unit purchase (LTF)
3) Original Passport or Work Permit of Taxpayer
Could you help to provide and send me the above document required? I will hurry to proceed accordingly.