What are the requirements for proving pension income for a retirement visa in Thailand?

Thanks for the posts. I'm new to the group and hopefully someday I can contribute. Age 57, from the US.

In Bangkok (CW) I did on my own my first 90 day and 1 year Non-O for retirement, multi-entry. I've kept over 1 million baht in BKK Bank. Plus, I wired about 70K each month from a US bank to BKK Bank, for the last 13 months.

I'm researching the 65k pension deposit method vs. 800k balance. I understand I can no longer get an embassy letter.

Will 12 months of bank statements work? Do I also need to show my US tax records, showing the pension? Thanks