ya 40/40/20 seems to be the standard. The real tricky part is actually finding what your caloric maintenance is (online calculators can get you close), then finding out what deficit is optimal. If you have no set date where you want to be 'x' weight or 'x' bf% then the smaller the amount of calories you cut each phase or week the better.
Right now I'm playing around with my calories/ carbs in particular to try to find what works best for me so far I've learned I can reduce carbs by a lotttt and not lose too much strength as long as I am upping them or re-feeding 2ish times a week. Good Luck man.
Also I'd recommend using a site like fitday.com or myfitnesspal.com to track everything, makes it wayyyy easier.