For illegal tint...
Hunt Brothers in Decatur I think they give warranty up to 5%? - $150

For regular tint like 35% with warranty...there is a place near Home Depot on Jimmy Carter that does clean work. - $150 to $200

I went for Solar Works in Alpharetta, 28% with warranty except from tickets. - $300 with discount

Or you can contact one of the site vendors here