How low should I go?

I've been reading into all this, and according to some calculation I done, actually can't remember the name of it,my BMR is 1668.65

How low should I go with my calories in order to continue a healthy weight loss?

Thanks for the reply.
Sometimes, I do feel though that I even struggle to go over 1200, just simply through lack of apetite :/
So to speak I don't want to force myself to eat when I;m just not hungry