Although calculators are notorious for being off, you'd need to reduce from the amount to maintain your current weight, not goal weight. So if a calculator said you would maintain at 1200 at your goal weight, that would mean that if you ate your goal weight maintenance calories, you'd lose weight. Also if you plugged in your current weight and got a maintenance calorie estimate, eating less than your current weight's maintenance level would result in weight loss.
If you plugged into a calculator for your current height, weight, age, gender, etc - it might say that your maintenance calories are 2000 (which is not an unusual number for someone near 200 lbs). So that would mean if you ate less than 2000, you'd lose weight.
Anyway, I would highly recommend look into upping your calories. Healthy fats are a good way to do it. I saw in another post where you said that you are eating 600 or 700 calories on a regular basis which really is too low without doctor supervision and some supplements designed for very low calories. I also think even if you were hitting 1000 calories, that is a bit low for someone who weighs close to 200 lbs. If you got down to 130 and found difficulty in losing weight, I could understand going down to 1000.
Often when people go too low on calories, they find it backfiring on them in the end. Which is why the general recommendation is to eat a moderate amount of calories, anywhere between 1200 to 1800 for most people will result in weight loss unless you are really close to goal.
You can't out-exercise poor eating habits.