Where do people go to renew visa and do 90 day report if you live in Phayao?

Can do on-line?

How many forums do you wish to ask this question in?

Chiang Rai Immigration at the office located in Chiang Rai

Edit

Have a read for directions

http://www.thaivisa.com/forum/topic/699802-immigration-office-in-cr-open/?hl=+chiang%20+rai%20+immigration%20+office

If you are after an extension of stay based on retirement they only do them on Mondays and Wednesdays