Unfortunately, Annette has not provided the information you "really" need. So here it is.
I have an LLC established in 2014, S election in 2016.
First, why you're dealing with this on a tax return that is 3 years back, I don't know. But it is what it is.
When you incorporated your business from a disregarded entity (LLC) to a corporation (S-CORP) that did not in any way form or fashion change your start business date.
Your *business* start date is still in 2014 on the same exact date you opened as an LLC. The business *INCORPORATION* date will be whatever date the business became an S-Corp. At a minimum, the incorporation date *must* be at least one day after you closed the LLC. But on the 1065 the business start date will be the *exact* *same* *date* you opened the LLC.
Then you'll find that you can enter your depreciable assets and the program will do things correctly. With your current incorrect business start date for the S-Corp, it doesn't matter what you do, the deprecation will be wrong *every* *single* *year*.
