@kkpatel wrote:
Based on the proposed Tax Reform with the substantial increase of the Standard deduction would it make more sense to refinance my investment properties as a cash out and payoff the mortgage on my primary residence?
Your question has implications and considerations beyond income taxation.
For example, you will most likely be facing anywhere from a 25 to 75 basis point increase in your mortgage interest rate on your rental properties than on your (owner-occupied) residence.
You have to do the math in order to determine whether the decrease in income tax liability is greater than the increased interest expense as a result of the higher rate.