Macros?

Depends on your preferred diet type you can adjust them or leave them as they are. You can read about body types and what macros ratio will be best for you here's link http://www.crossfitsanitas.com/best-macronutrient-ratio/

I'm on 40% carbs, 30% proteins and 30% fat.

I don't worry about macros. It's good information to have if you're a bodybuilder or if you have a medical condition, but for most of us, just eat healthy meals, and you'll be okay. I've started tracking my sugars, because of a health condition, but that's all I care about and the only set of macros I'm keeping track of on my food page. (You can adjust your nutrients tracked on your Settings page to display what nutrients you want to track or nothing but calories, if that's what you want to do.)