I will be moving back to Thailand in September from the US. My wife is Thai, so I intend to get a Non-Immigrant Visa (O). It looks like I can apply for the visa via thaievisa.go.th I have no experience using that service/website.
My question is this: When should I apply for the visa? Is it effective immediately upon issuance or upon entry? I don’t want to apply too soon and cut myself short a couple months, assuming it becomes effective immediately (may not be the case?). If I apply soon, is it possible for the visa to not be valid until September? I need to utilize the full year of the visa, so I don’t want to cut myself short by getting the visa too early.
Any advice would be appreciated.