What should I do to obtain my ED visa before the amnesty ends in Thailand?

@Cameron ******

what you should have done was WAITED to cancel the extension you were on from the RS visa and then cancelled it and applied for a new extension based on education right then. (That's assuming you would have used the same office for both though).

I personally know of NO ONE <- as in not a single person who was able to go from amnesty <- (meaning the only stamp in their passport is expired) to ANY in country Non-Immigrant type visa.

As a rule the immigration offices that issue in country Non-Imm visas need REAL hard stamp days left on your current stamp to apply for a new visa.

As Ben said, all you can do is go to the immigration office and ask.

The worst they will say is nope, they can't do it, then you'll be on amnesty (like you are now) and wait it out and do what ever it is the government tells amnesty holders they have to do when the amnesty is over.