How many calories should I be eating? F,40, 5'3", 80Kg

I'm a bit confused about how many calories I should be eating everyday to lose fat.
I'm Female, 40 yrs old, 5'3", 80 kg (176 lbs) and I think I'm at about 40% body fat but not super sure about that.

Anyway, since November 2013 I've been exercising for an hour on average 4-5 times a week (weights, cardio, some functional exercises, occasional swimming and running) and eating pretty clean as well as tracking my calories via MyFitnessPal.

The first year I lost about 10-11 kg (22 lbs) (I was 90 kg when I started out)

But as of the last 12 months I seem to be stuck on 80 kg and the scale just isn't budging. I've been getting a lot of confusing information regarding how many calories I should be consuming.

MyFitnessPal gives me an allowance of 1470 per day. Also my trainers at my gym recommended that my daily intake should be about 1400-1450 calories and so that's what I've stuck to for the last year or so.

But when I wasn't losing any, I decided to do some research and I'm more confused now than when I began.

An online BMR calculator calculated my BMR as 1406 calories.
I've recently read about TDEE and various TDEE calculators have given me a reading of between 1800 and 2400 calories.

So the thing is now with so many numbers floating around, I honestly don't know what a healthy daily intake ought to be for me. So please if anyone can figure out if I'm eating enough or too much, it would be much appreciated.