How to properly pay back a LOC for correct write-off

[Steven Lewis]

I was blessed to have money gifted to me from my parents from their LOC (line of credit). The LOC comes with a monthly payment which I am looking to pay so I get that tax benefit. I'm looking for advice on the best way to show payment on this loan so I can deduct for taxes. I currently have an S corp and would like to pay that payment through the business. Would it be better to pay it back directly to my parents? Or to pay the lender directly?