Do I get exercise credit for working a 12hr shift on my feet

If you had put down that your lifestyle is active due to your profession, no I wouldn't include it. Your daily amount is derived from what you do on a daily basis. If you count that as exercise, and eating those calories, you are negating the calorie deficit you are trying to create. I put down a sedentary lifestyle because I am in front of a computer most of the day. I wouldn't factor in any calories I get from walking to the bathroom and back. Those are already factored into my day.

This is exactly what I was going to say ... this should already be accounted for in your settings. If you aren't sure, go to goals, click on 'change goals', select guided and change the option for how much movement you are getting during the day and it will take that into consideration automatically when it calculates your calories

It really is not considered exercise, but should have been calculated in your initial caloric intake for the day. When it asked you what your lifestyle is sedentary, active, etc. It gives you calories to accommodate the extra energy you would burn being active throughout the day versus sitting at a desk all day.
In order to truly count a workout one must sweat to burn the fat, a workout is over and beyond your regular daily activities. I see a lot of people adding in and eating calories back for things that would not really constitute a workout but rather a daily life activity, and then they are griping about not losing weight, lol. Now if you are mowing your lawn with a push mower, and squatting down and pulling weeds for an hour or two and you are working up a sweat then you can add that in as a strength workout., but leisurely shopping and strolling around a mall is not really an exercise. It takes 3500 calories burned in order to drop 1 pound of body fat. The more honest we are with our numbers.....calories and exercise......the better the results we will see!