Last year I purchased my first home and this year in late summer I started renting a bedroom to a traveling nurse. I charge a fixed monthly rate and don't charge separately for utilities. I have looked at schedule 527 but I am still confused as to how to deduct or take credit for utility expenses (calculating by square feet? (we share common areas) or number of (bed)rooms, or number of people in the house?) Will I have to itemize deductions, or what is the tax process for applying rental income towards utility expenses? I also would like to know if there are credits for applying rental income towards real estate tax and how to calculate depreciation.