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 1/3 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.