Everything that Tod has told you, I had the same my wife just put in the letter that we were married and she wanted to visit Thailand with her, They accepted that good luck
Thans Marty been coming Thailand for many years but only on tourist visas.I am clueless about other visas I got told last year I may have to leave and apply for married visa I have not looked into it yet I am waiting for covid situation to calm down the rules seem to change from week to week