Primary and secondary refinance and tax planning

Hello,

I am currently in the middle of delayed financing (cash out) for the second property I recently purchased, All of the cash out money would go into rehabbing the property.

Since the interest rates are low, I am also refinancing my primary home. However, just today I read the following article

https://www.sfchronicle.com/business/networth/article/Want-to-refinance-Make-sure-you-understand-the-15112448.php

I am unclear as to whether I would be able to deduct all the interest on both of these properties?