I’m in Samui and Immigration here hand you a cheat sheet of everything you need to provide. But that’s Samui and maybe other immigration offices don’t provide the same thing. You can only ask or maybe go on their website
I’m in Samui. Been the same requirement here since I’ve been here. So to make everything easy for immigration I go to the bank first thing. 8:30, pay for the print out then with a highlighter pen I mark all my international transfers. Then I add them up and write the figure down. Better too much than too little