We moved during 2016 and turned our old personal residence into a rental property. Do I enter the mortgage and tax deduction in both the personal and business sections?

Allocate each portion to personal/rental section. Ex: Lived in home for 9 months and rental for 3 months. Allocate 75% of interest as a personal deduction and 25% as a rental deduction. Navigate to each section to enter their proportionate share.