What should I do if my passport doesn't have enough validity to acquire a yearly visa in Thailand?

You asked this question 7 hours ago on another forum in Chiang Mai....and

@Tod ********

gave you the same reply there as he did here 1 hour ago.

Hope you understand what Tod has said.

If you're talking about getting another year extension on a passport that's not valid for that year, the rule is if your passport is not valid for the term of the extension you get one granted up to the expiration date of your passport (when ever that is).

That becomes your new expiration date.

When you get the new passport you to to the immigration office with both passports and the letter from the embassy to get the stamps transferred to the new passport.