New passport, now must get extension. What's the procedure?

[Haljabra]

I read other topics on this subject but I'm still a little confused. Here's My question.

 

I just got a new US passport but on the first of next month I have to get an extension of stay for a Tourist Visa. So do I go to immigration apply for the extension and have them transfer stamps there or do I have to go to the border to do the transfer?

 

 

[Swimman]

Apply for the extension at an Immigration office. They will transfer your entry stamp as part of the process. 

[darrendsd]

You can do it all at the Immigration Office at the same time

 

1900 Baht for extension, 1 photo, forms

 

Depending on which office you use they may charge you 500 Baht to transfer your stamps into the new PP,  this is not a official charge, it should be free