I haven't really seen a decent tab for this, so here's what I think:
(verses)
C G Am Fmaj7/F F
When I Find myself in times of trouble, Mother Mary comes to me,
C G F C
Speaking words of wisdom, let it be.
C G Am F
And in my hour of darkness she is standing right in front of me,
C G F C
Speaking words of wisdom, let it be.
(chorus)
[ Tab from: https://www.guitartabs.cc/tabs/b/beatles/let_it_be_crd_ver_5.html ]
G Am G F C
Let it be, let it be, let it be, let it be
G F C
Whisper words of wisdom, let it be
Use this same structure for the rest of the song:
And when the broken hearted people, living in the world agree,
There will be an answer, let it be.
For though they may be parted there is still a chance that they will see,
There will be an answer, let it be.
(chorus)
And when the night is cloudy, there is still a light that shines on me,
Shine until tomorrow, let it be.
I wake up to the sound of music, mother mary comes to me,
Speaking words of wisdom, Let it be.
(chorus x2)
There we are, nice and easy. Enjoy.
Sam.