Think this website is a bit better for working out what calories you should be eating and the split between carbs, protein and fats. https://www.iifym.com/
Once you have the splits you can adjust myfitnesspal to match these.
But if you put in you are active then the calorie allowance will adjust for this (giving you more calories) and if this includes your exercise then you can't go eating those calories back or you won't end up in a calorie deficit.
Think this website is a bit better for working out what calories you should be eating and the split between carbs, protein and fats. https://www.iifym.com/
Once you have the splits you can adjust myfitnesspal to match these.
But if you put in you are active then the calorie allowance will adjust for this (giving you more calories) and if this includes your exercise then you can't go eating those calories back or you won't end up in a calorie deficit.