mortgage info

My mother is the lender. I've been doing this on TurboTax for more than 10 years. But this year TT asks: Outstanding Mortgage Principal = ?  this is a new question for TT! I don't have a 1098. This was never a problem before. I have the Mortgage origination date. It also asks for "Mortgage acquisition date =?" This is also a new question this year. all of this probably doesn't matter due to tax changes and standard deduction increase but I need to input to continue my tax return.