hy all

I have question about the visa extension:

i got 2 entry tourist visa at 14 august( stamp valid oct 12 ) and need to go to immigration in october

Can i go to make extension in next month ( september) for get the next stamp (in november )?

It depends on the immigration office that you use. Normally you would go when there were 30 days or less on your current permission to stay, but it has been reported that some offices will do it sooner. You will need a TM 7 form and 1900 baht.