How can I extend my visa in Thailand to obtain a year extension based on marriage?

It works like this

1 - You get your 400K baht funds in the bank in your name only

2 - You GO to your immigration office and apply for a 90 day Non-O visa for 2000baht

*NOTE: (there is no requirement that the funds be in the account for any length of time only that you have a minimum of 15 days left on your current stamp)

3 - The application goes under review for 14 days and you go back to get the Non-O visa and a NEW 90 day stamp inked in

THEN

4 -Once that new 90 day stamp runs down to 30 days or less AND your 400K baht is in the thai bank account for 2 months you go back and apply for a year extension based on marriage to a thai for 1900bhat

5 - That will go under consideration for 30 days and then you go back and get the year inked in

That is how the process works

that's not how it works sadly 🙁

You left out a critical step.

You can't get a year extension from a 30 day visa exempt entry 🙁 not even if you have the 30 day extension and the 60 day visit family extension.

You FIRST have to get a 90 day Non-O visa <- that is the critical step in the whole process going from a visa exempt entry to a non-O visa to a year extension and you can't skip it