#1 The FFIEC Manual. #1 FinCen website. From there it's savings sites as you go. Another site I have found helpful is the National Archives Code of Federal Regulations. I have it saved on Chapter X, but I've looked up some other things.
https://www.ecfr.gov/current/title-31/subtitle-B/chapter-X Also, depending on your state, the site for State General Assembly. Once you figure out how to read it, lots of good info for when you need to refer to state regs.
I wear a a few different hats, so I have a lot of sites saved to my desktop as I don't like looking for things twice. I have also made a "Manual" for everything I do, in case I am ever absent for an extended period of time. It also contains all my favorite links BSA related or not. I'm a weirdo and like to make manuals lol!