I've prepared quite a few of these forms and you have me thoroughly confused.
Why do you believe Schedule A is strictly for charitable gifts? It is definitely not. In the event you are trying to prepare the form manually, you can go ahead and give it your best shot, but you would be well advised to use tax preparation software, such as that listed below (or have the return professionally prepared).
https://www.puritas-springs.com/product-category/federal
