My property manager issued a 1099-MISC for rents and utility payments, but has put the utility payments ($720) in box 3. How can I assign that $720 to schedule E? Thanks

After you have entered the Form 1099-MISC with your Schedule E, the amount in box 3 can also be included as income under that property in the 'cash' category shown as other rental income.  This box allows just a single entry for an amount of income to be reported.  

Thank you!