Michael does not have tablature written out for his songs. However Steve Radcliff has supplied fellow fans with a few songs.
You'll need Acrobat Reader to view them - if you don't have this program, you can download it free at http://www.adobe.com/products/acrobat/readstep2.html
This Time of Year
Trouble in the Fields
New Kid In Town
Too Soon to Tell
You'll Always Be Heart and Soul to Me
I'll Always Love You