Comming from the Netherlands you can also proof your income by a income statement given by the Netherlands embassy. That is if you have a pension of at least worth
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baht per month. If this is the case you not need any money in a Thai bank. Do you know of this option? The letter is called visum ondersteuningsbrief.
Jack. You have to request a new extention in Thailand. You can do that within 30 days from the date the current extention expires. Meaning you can do it next week already
If you are on a extention as you say. You will not get a new extention by going out and returning to Thailand. Extention means your original OA visa exprired and the right to stay in Thailand is extended. You can only request a new extention at the immigration in Thailand.
James was talking about bouncing and maximise the use of your current visa. It did not answer your question about when can you do the yearly extention. I explained that.
30 days before your permission of stay expires. Your visa dates are only mean the time before you finaly should enter Thailand. A extention you request within 45 or 30 days (depend on your local immigration) before your permission of stays expires. So from 30 or 45 days before 8th of May.