It's good that you are aware of what you are eating. And to add, I think you are right. 1200/1400 is not enough of kcal. Specially with an active lifestyle and working out.
Have you ever calculated what your maintainance level is kcal wise? Because without it it's really hard to say just weight, without age, length and level of daily activity. I can't tell if you will gain or lose weight on 1800 kcal(or whatever number).
Also your training matters. Is this strength training? Marathon running or some mixed or in between. Losing weight is a number game. But it's not just the numbers that matter.
If you are talking about eating too few calories to lose weight, then I'm sorry, but you've been misled by a very popular fitness myth.
If your goal is weight loss, and you're not losing weight, it's never because you are eating too few calories. That goes against the basic laws of physics. People will talk about starvation mode and your body conserving calories, and it all sounds vaguely logical, but it's actually all wrong. In fitness, there is no starvation mode. In the real world, starvation mode happens to people who are literally starving to death. Its effects are very subtle, and it certainly doesn't halt weight loss, it merely delays death by a matter of hours/days.
Despite what many people still believe and repeat to reach other, the reason they are not losing weight is not that they are eating too little, it is that there was a miscalculation made somewhere. Always. Miscalculations in calorie counting are practically guaranteed to happen, since calorie counting is very much NOT an exact science. We use estimated values for every single element in our calculations.
If your goal is weight loss and you're not losing weight, the easiest fix is to adjust your calculations using a lower maintenance level, until you start seeing the results you expect. This may give you what seems to be a surprisingly low maintenance level, which is actually an untrue value, but you're not using that value to achieve maintenance, it's simply a tool to achieve the goal of weight loss. However, if this bothers you too much, you can choose to adjust your exercise calories to lesser values instead (I would try half), or your food calories to higher values, it all ends up doing the same thing, I just think adjusting one value is easiest.
Now, there is a whole other side of things which involves cheat days and refeeds and other tricks to get the most of your metabolism and mental stamina for dieting, but those are a different matter altogether, and are not related to the idea of eating too few calories to lose weight, which, again, is a myth.
Another basic question is are you losing weight now? Because I had the feeling you were asking because you weren't feeling Allright with the amount of food you were now eating.
Patrick is right. You never eat to les kcal to lose weight. If you aren't now. It's most likely you under reporting what you eat. Or over estimating what you burn in workouts.