Hi, I was wondering how I go about applying for an extension of stay based on marriage? I earn over the required amount per month, so what's the next step? how do I go about proving it?

Many thanks

For income from outside the country you would get an income letter at your embassy to prove the 40k baht income.

If working here with a work permit you would prove it by income tax payment receipts.

ok great what do I need to provide  to the embassy to receive a letter from the embassy?

7 minutes ago, scotyw1 said:

ok great what do I need to provide  to the embassy to receive a letter from the embassy?

That depends upon what your embassy wants.

If you would tell me which country you are from I might be able to help.

I'm from the UK

9 minutes ago, scotyw1 said:

I'm from the UK

You get it by mail. Info and requirements are here:  https://www.gov.uk/government/publications/how-to-obtain-a-pensionincome-letter-for-thai-immigration