actually increasing your fat intake to about 1g per kg of bodyweight(for 200lb person roughly 90g) is recommended to keep hormone levels balanced during a cut, as well as getting a chunk of your calories from to replace the carbs you are cutting out. it also helps with other things but that's a story for another day. you still need a calorie deficit. just make sure its healthy fat. the world health recommendation for saturated fat is below 16g a day for a 200lb person. carbs are the main macro you'll be watching like a hawk.. along with an incredible amount of protein to reduce muscle breakdown or loss of strength.
my suggested macros are below:
1g or more protein per lb of bodyweight.. very important during a cut. 35 to 40%.
fat 1 g for every kg of bodyweight(notice its kg not lb) roughly 30%
carbs-..75 to 1g per lb of bodyweight. 30 to 35%
.protein-75 to 1 or more grams per lb . 30%
carbs -1.5 to 2g per lb. 50%
fat-20% of diet<-- this is the only time you want your fats to be lower. for a 3000 calorie diet this equates to 600 calories from fat or 67 g
if you need to reduce your calories, start with carbs, but Try to stay in a healthy range to avoid loss of muscle which occurs from lack of glycogen in the muscles. then protein then fat can be reduced. after a while your metabolism will adapt and you'll have to cut more calories or try carb cycling to continue cutting.