My music has a number 6 on the finger notation and I can’t figure out what finger I’m supposed to use.
Unless you are one of King Henry's wives, you don't need to worry too much!! The '6' there is indicating six notes in the time of four. Like double triplets.Called sextuplets in the trade.
It looks like a slightly different font from the fingerings on the music stave - and again different on the tab.
The lower numbers are the suggested fingerings.