That’s actually not correct. You can refinance a loan with origination date prior to 12/16/17 and still be grandfathered in at $1m limit but only up to the limit of the balance of your original loan at the time of refinance.
https://www.google.com/amp/s/www.cbsnews.com/amp/news/deducting-home-loan-interest-trickier-under-ne...
