i have a one year visa issud by thai embasy in my country valid till december this year multiple entry

issud on my pension 70.000bht a month

i come back to thai on october till april 2014

can i have a extencen in thai and wath to do

The Pattaya City Expats club has published a guide which details the process for obtaining an extension of stay or renewing a retirement visa. It can be found here: http://www.pattayacityexpatsclub.com/expats/docs/ExtendingStay.pdf

If you will not be resident in Pattaya, but rather elsewhere in Thailand, you may want to review the information contained in the "Thai visas, residency, and work permits" forum as the process and requirements seem to differ depending on the province of residence. http://www.thaivisa.com/forum/forum/1-thai-visas-residency-and-work-permits/

Moved to Visa Forum

You apply for a 12 month extension at Immigration.

You need a letter from your Embassy stating your income.