Brown turkey; drain. Stir in seasoning mix and water. Bring to a boil. Reduce heat to low; simmer 5 minutes, stirring occasionally. Remove from heat; stir in 1 cup of the sour cream. Place one third cup of turkey mixture in center of each tortilla. Fold in sides and roll up to enclose filling. Heat large nonstick skillet on medium-high heat. Spray with no stick cooking spray. Brown 4 chimichangas on both sides. Repeat with additional cooking spray and remaining chimichangas. Serve with remaining sour cream and salsa.