Can anyone tell me for sure if you can apply for one year extension 30 or 45 days before your present visa expire, in Jomtien Soi 5?
TLDR : Answer Summary
The general consensus among commenters is that in Jomtien, you can apply for a one-year extension of stay within 30 days of your visa's expiration. However, some reported being able to discuss applying up to 45 days in advance if they had a valid reason, but this is not guaranteed. The information may vary by location; for instance, in Chiang Mai, applications can be made up to 45 days prior.