I understand that I can get my TM8 at the airport.

Where at the airport is this available and can I get it tomorrow morning at about 8am?

I assume the office is before immigration.

Will it take long to issue.

First time I will have used it,do I just proceed through immigration and they will,what?

thanx

There is a desk immediately before passport control (after security). Down the escalators, turn right and it is straight ahead. Open 24 hours.

You cannot get a re-entry permit (TM8 is a number of a form) airport unless you are leaving the country. You need a boarding pass to get where the desk is located.

You will be charged a 200 baht service fee above the cost of the re-entry permit.

thanx to you both

As a point of interest, flying out of Don Muang on an international flight the office to obtain a reentry visa is AFTER passport control. Happened to me a few weeks ago. Approached the passport control desk and told the officer my predicament and handed over my passport. Was told no problem you will get stamped out and the office 20 meters behind the booth will issue the reentry. I questioned this as I did not want to get stamped out before requiring the reentry visa, but all was above board and the reentry was issued as was told with no additional sum added to the cost of the reentry itself.