Navigate to the return that you'd like to check the status of and open it. While within the return, push the F7 key across the top of your keyboard. You can also access this screen by going to Tools>Return Status.
This window will show the rejection/acceptance date of the return. If it was rejected, you can click the rejection tab and see the rejection reason for the return so that you may correct it. This applies to 2016, 2015, and all prior years.