50 minutes ago, EricTh said:

You can update yourself by keying in the information on the online banking with your bank book details. I've done that myself many times. Access to online banking usually takes only 1 day.

 

There's some miscommunication due to language barrier between you and bank staff.

I know it’s supposedly easy, but it keeps telling me that I cannot register, and to go into the bank. Each time I do, they “update” my visa info and say it will be ok in a few days. No, it never is.....try again. Next time I might go over to their head office on Silom, perhaps the staff there are half competent.

2 hours ago, sfokevin said:

Doesn’t one need a certificate of residence to apply for the withholding refund?...

 

The going rate for a certificate of residence at Chiang Mai Immigration is 1,000 baht... 

absolutely not for a refund...(did it twice in CM)...but....no telling what kind of crap they could throw at you to get the tax ID in the first place.  I never had a WP...