i have weight loss questions i need HELP

Myfitnesspal should calculate the Calorie intake for you ? Be sure to complete your settings. Depending on the activity you do in a day your daily calorie intake will change . Healthy weight loss is 1-2 pounds a week. i think your calcuation will show around 1600. and i you burn 500 with activity you will beable to eat 2100 and cont to drop the pounds

The healthy way to lose weight is to give your body what it needs to survive and use the nutrients to your advantage. I recommend using this site to find your TDEE and go from there.:
http://scoobysworkshop.com/calorie-calculator/
I did yours based on the numbers you listed and with a low amount of activity, and it says that to MAINTAIN your weight, you would have to consume about 2000 cals per day. To lose fat with a 20% cal reduction, 1655 is the number it spit out. You may want to adjust that if you do more activity. More activity = more calories needed to support your body!
I have read a lot about the ratio of protein to fat to carbs and most will say that the closer that you can come to about equal on all is best.
One thing i know FOR SURE is that depriving your body (eating under BMR) will make you plateau and sometimes even gain. Also, I am afraid that losing 1lb per day is not practical. You didn't gain extra weight a pound a day so coming off is going to be a process as well. But it is great that you are on your way with the cardio and weight training. I think you will get the body that you want if you continue this process and don't deprive yourself of the things your body needs to support the activity that you do day to day.
Good luck to you!

At 5'6" and 146 pounds you are at a healthy weight. Losing a few additional pounds would still keep you in that healthy range...where as losing 20 pounds is unrealistic and unhealthy. Forget the scale and lose the 'want to lose one pound a week' mindset. If you want to see changes in your body - lift heavy weights, if you can do more than 12 reps it's too light, make sure your getting enough protein (80 to 100) grams. Go back to eating 1800 cals a day. Not hungry enough for that extra 300 calorie more then you're eating now? Try a couple tablespoons of peanut, or a handful of nuts, avocados, olive oil....a little bit of any of these foods boost your calories.

Exactly what she said! Also if you are already in a healthy weight range it will be very hard to lose that 1 lb a week without going on a VLCD...which in my opinion are a waste of time, energy, and usually money.

At 5'6" and 146 pounds you are at a healthy weight. Losing a few additional pounds would still keep you in that healthy range...where as losing 20 pounds is unrealistic and unhealthy. Forget the scale and lose the 'want to lose one pound a week' mindset. If you want to see changes in your body - lift heavy weights, if you can do more than 12 reps it's too light, make sure your getting enough protein (80 to 100) grams. Go back to eating 1800 cals a day. Not hungry enough for that extra 300 calorie more then you're eating now? Try a couple tablespoons of peanut, or a handful of nuts, avocados, olive oil....a little bit of any of these foods boost your calories.

This completely!! If at this weight you think you are fat and need to lose 20lbs then you might want to consider talking to someone because there are some other issues going on. I say this with all best intentions for your well being. I'm 5'2" and 125lbs would be fine for me but not you.

I was under the impression that the healthy weight was between 120-155?
So a more realistic goal would be 5-10lb loss & to tone up?

I am unable to make it to the gym because of my schedule so 3-4 days out of the week at home I do
taebo
Legs&back p90x
Plyometrics p90x
shoulder & arm p90x. (I used to do the program & came from 174 tp 155 on it but loaned them out & only have those now)
or I walk

So stop eating 1500 & bump up to around 1800? And this will help me get to where I want?

I really appreciate all the responses I am getting

I probably misread your original post but I thought you said when you ate at 1800 you lost? So I suggested some foods to boost you from 1500 to 1800. Have you calculated your TDEE? Here's a good site if you haven't already - http://scoobysworkshop.com/ If you calculate your TDEE and eat at 15 to 20 % less that should give you a good deficit. Also are eating your exercise calories back?

I think you should be more focused in losing body fat than the "general weight". If you look in the Success Stories thread you will see a lot of people who tried going down to a weight they wanted only to see that it doesn't look good on them. Later on taking up the challenge to increase your "general weight" without gaining much body fat but instead gaining lean muscle mass. Like me I've seen guys with the same measurements like me at 145-150 lbs same height but look more sculpted because they're composed of more lean mass than body fat.