Deductions & credits

This can be caused by a couple of different things.... you have a category of expense with no $ amount listed to it or a zero  ... if so delete the amount and the category ... the program doesn't allow a category without the $ amount and it will not accept zero (if you were trying to preserve the category for a future use you have to get rid of it and add it back in the future). 

Or you are using the downloaded program and you have a "supporting details" breakdown lurking behind the zero from the prior year ... so click on the zero amount to open the supporting details pop up and delete the unwanted lines.