Download the Thailand Digital Arrival Card. You can also download or print a copy from the email address provided for the duration of your stay in Thailand.
I stopped by my immigration office in Khon Kaen today to see if everything is going to be okay. They told me that I am fine as long as I can show 12 months of deposits of 65,000 per month I don’t need to keep the 800,000 or 400,000 in the bank. Yes I had to wait for 3 months after the initial 1 year extension which I did. I realize each IO is different. But they said no problem when I come back for my 1 year extension.