carbs are not evil and have there purpose in a good diet. Depending on what type of diet you want to use (CKD, medium carb, etc.) that is what will dictate how many carbs you should take in and when. Also what will be the deciding factor on carb intake to lean out is how your body reacts to them (everyones different.)
Do you have any experience with different types of cutting diets? Do you gain fat easily? Is your diet just now getting on tract? Stats (Height, weight, bf, etc)?