Deductions & credits

a wrinkle:
This happened before Dec 15 2017... according to the Help File on TurboTax CA, these "what did the money get used for" do not apply to those earlier mortgages.  is that just for CA or is that true of the Federal stuff too?

Also if my standard deduction amounts to more than the itemized deductions.... does that make this a moot (irrelevant) point?