where refi rental mortgage info entry?

You can search for rentals and use the Jump to rentals link.   Or, to enter your rental mortgage interest and other refinancing expenses, simply follow the directions to enter your rental income and expenses.  At some point you'll come across the Here's [your property's] rental property info screen. Under Expenses / Assets (Depreciation), select Add expense or asset and follow the onscreen instructions. 

You can enter information for multiple lenders or delete a lender if necessary.   You will come to the following screen in the Rental Expenses area of TurboTax to enter mortgage interest.  

Refinance fees and mortgage points are entered in the Assets (Depreciation) section.   The IRS considers these amortizable intangibles and accounting rules dictate that those are to be depreciated instead of deducted as an expense.  The costs associated with obtaining a mortgage on rental property are amortized (spread out) over the life of the loan. 

Other refinance-related expenses not directly related to the mortgage may also be deductible. Generally, if the cost is associated with operating the property (like real estate taxes or hazard insurance) they're deducted as expenses, whereas costs associated with purchasing the property (like title search fees or recording fees) are added to the property's cost basis, which means they get depreciated.  

What can I deduct when refinancing rental property?