Where can I find accurate Beatles bass tab for free?

There is a great book, although very pricey, called The Beatles Complete. It basically has every part on every Beatles track notated from all the voices to strings and all sorts. But I'd strongly encourage you to just listen to the records to death and sit with the bass trying to work out the basslines yourself. If you are able to hear there are errors in a tab then you are able to find when you are on the right note on your instrument.

It's a bit of a laborious process in the early stages but it will get easier and faster as you do it. Your ears and musicianship will thank you for doing that work regularly!

 

When I was eighteen I was out touring bars already (dropped out of University after 1st year - "SEEMED LIKE A GOOD IDEA AT THE TIME") and we had CASSETTE TAPES (!). So that summer I sat down and transcribed the bass lines to the entire Beatles discography in my spare time. (Standard notation, as TAB wasn't really a thing yet, and the internet was not in existence). A few hours every single day for the whole summer. This is an exercise I would recommend to anybody... there is something to be said for having a close listen!

 

Sometimes you have to spend money for
good charts. Not everything is free.

 

On your right or your left, free usually doesn't mean accurate.
Once you get it nailed down from the studio recording, you might find that the artist plays it quite differently live.

I discovered this a few months ago with a song called 'This is Heresy'. The studio recording is subdued in comparison to their live performance of the track, with completely different fingering!

 

Very astute observation. And I had to look up astute to make sure I was using it correctly .

I agree with your suggestion.

There are also lots of isolated bass versions to make it easier. Some are better than others but here's a couple...