It is very individual but generally speaking, to calculate your rough metabolic rate, multiply your body weight by 15. That will be roughly the amount of calories you need to maintain your body weight. If you are looking to add size (or bulk), multiply your body weight by about 16-17. If you are looking to loose weight (or cut), multiply your body weight by about 13-14.
During your PCT, you want to stick with a maintenance calorie level (15x body weight). You don't want to try to loose weight during your PCT because your hormones are low and you will be more likely to burn muscle. At the same time, with low hormones, you will be more likely to store body fat if you try to bulk during your PCT.
Either bulk/cut with your cycle, and then maintain your results during your PCT. Your PCT should be focused on recovery.