The company I work for has many different business locations. Each year we fill out a 1099 Misc for the vendors we pay rent to. I need to know if I've been filling out the form correctly. Should I only allocate the amount we paid for rent only, or, do I need to add the cams we paid out to these vendors as well? Cams (common area maintenance) include electric bills, parking lot clean up, heat repairs, etc. I'm not able to find the answer anywhere and the IRS phone line is always too busy to accept phone calls.

Thank you,
Leslie

The vendor must report rent received as well cams as income. It is for them to claim expenses.
You should report rent plus cam (total amount paid to vendor) on 1099-misc unless you are collecting receipts from the vendors for CAM expenses and your are reporting it as your own expenses.