Can I renew my Thai visa extension based on marriage if I previously extended it based on having a Thai child?

IF you "pushed your own paper" and got your yearly extension granted at the immigration office that serves the area where you live

AND

if you've been doing 90 day reporting on time

AND

if you meet the proof of funds for a year extension based on marriage (including the 2 month seasoning of the 400K baht) you should have no issue changing the reason for your extension from one based on raising a half thai child, to one based on marriage.

Definitely GO to your immigration office with your thai wife before your current extension comes due to get the hand out and ask them if there's anything required that isn't on the list.

It works the same way, you'll apply for a new yearly extension, get a 30 day under consideration stamp and then when that winds down you go back and get the year extension inked in.

and you received this extension at the immigration office that you are supposed to use by turning in the correct paperwork on your own OR did you use an 'alternate means' to secure the extension last year?