Trying to find tdee

Ok so I used the scooby calculator and it said my bmr is 1271, my tdee is 1748, and my daily calories should be 1399. Is this method usually correct? I was eating at 1200 or less calories a day according to what Mfp said. But the weight loss is stalling. I only have about 10 more pounds to go to gw. Any advice would help.