They didn't change the logic, but they did add a link for how to supposedly enter this in TurboTax. On the 1098 entry page, there is a link at the bottom "Taxpayers with loans above $750,000 funded After December 15, 2017". This help link has the following:
You may be able to qualify under the $1,000,000 limit even if your existing loan funded after December 15, 2017 if you meet one of the following scenarios:
Scenario 1: Refinance of Acquisition Debt
You purchased the home before December 15, 2017 and have refinanced the debt. If you loan is above $750,000 please input the Mortgage Origination Date as the date you first purchased the home
The call out says you qualify for the interest deduction (consistent with Pub 936), but it's super hidden, and it still doesn't work. If you enter the origination date as the original purchase date for the refinance loan in Box 3, it messes up the refinance points amortization calculation and it adds the average balances (12 months) instead of prorating them (7+5, for example). So it confirms the deduction, but still doesn't fix it the calculation in TurboTax.
