The other tabs were close but i think this is bang on Verse 1:

Sittin'^G in the mornin' sun, ^B7 I'll be ^Csittin' when the even^Ain' comes. ^GWatching the ships roll ^B7in, then I ^Cwatch 'em roll away a^Again, yeah. Chorus: ^GI'm sittin' on the dock of ^Emthe bay, watching the ^Gtide roll a^Emway. Oo, I'm just ^Gsittin' on the dock of the ^Abay, wastin' ^Gtime. ^E Verse 2: ^GI left my home in Georg^B7ia, ^Cheaded for the 'Fris^Aco Bay. ^GI have nothing to live ^B7for, ^Cit look like nothin's gonna c^Aome my way. Bridge: ^GLook ^D7like noth^Cing's gonna change. ^GEv'^D7rythi^Cng still remains the same. ^GI ^D7can't do what t^Cen people tell me to do, ^Fso I guess I'll re^Dmain the same, yes. Verse 3: ^GI'm sittin' here restin^B7' my bones, ^Cand this loneliness won't^A leave me alone, yes. ^GTwo thousand miles I roa^B7med ^Cjust to make this-a doc^Ak my home..

Then Chorus on the C to A parts play the C chord then little run down to the A e|-0-------0--| B|-1-------2--| G|-0-------2--| D|-2-------2--| A|-3-3-2-1-0--| E|-0----------|

Otis Redding - Sittin on the dock of the bay