for schedules C, E or F, if you have a net business loss you may or may not have a net operating loss that can be carried over. Turbotax will not compute this. use schedule A of form 1045 to compute if you have a NOL. for other forms and schedules there may be specific rules about your situation. you would have to provide more info
https://www.irs.gov/pub/irs-pdf/f1045.pdf
