For rental property, all capital improvements are entered in the Assets/Depreciation section. It does not matter if the improvement was done before you converted it to rental, or after. THat's where "ALL" capital improvments are entered.
But in your case, it looks like you did not enter your capital improvements "at all" when you converted the property to a rental back in 2014. If so, you have a *MAJOR* mess of which the back taxes, fines, penalties and late fees are going to make the cost of professional help seem like a pittance in comparison. So seek professional help yesterday, if not sooner. A "true" professional can help you to reduce all the files and penalties you "WILL" pay if you try this on your own. Then, if your state also taxes personal income that will double all the fines, penalties and back taxes because after you pay the IRS for your mistakes, you'll also have to pay your state. Get professional help yesterday, if not sooner.
