Got to know how

I see folks asking about chords to a song, etc.. so, I thought I'd ask about a tune I've been looking for a long time.. I think its written by Sippie Wallace but was on a very early album by Bonnie Raitt..  I can figure it out to a point then there's just a chord or two that escapes me..  The song is You Got to Know How.  Appreciate it...  Deb