5ft -5ft 3 ladies how much are you eating?

5ft 3 1/2in. Recently lost 30lbs on my journey. Have done this before and have decided that it has to be a total lifestyle change. Will be 58 soon and want to be at my goal of 60lbs lost by then. Have cals set at 1000, doing treadmill 3x week with some strength training and walking on gym off days. Usually eat back part of cals given for excerise. Trying to eat healthier and glad I found this app to help me trsck and see what I'm doing on a daily basis.