Hi. Sorry to ask something that must have been asked before but I received confusing informatiin from the Chiang Mai immigration office.

If I am on a retirement visa (my first time) and I want to do the same next year, does the money have to be in the bank two, three or four months before I hand in my application? Some websites give different answers. And is it a matter of sending in the exact same documents as the first time? Will those documents need updating - besides the bank stuff? And can I choose when I do it? I was thinking I might do it two weeks before my current visa expires, although maybe earlier so I have plenty of time if I get anything wrong. Is there an earliest date you can apply before expiry? Thank you!