Your requirement falls with your weight (one of the reasons that diets 'taper' is that the same intake which gives weight loss initially will taper to a lower static weight even in the absence of metabolic adaptation (starvation reflex)).

You can estimate what your final requirement might be by redoing your BMR x 1.4 at your target weight, and comparing to that for your original BMR x 1.4... which is likely to have been close to your actual habits of the past.

Bear this in mind too when evaluating progress and planning your nutrition and exercise regimes.