Since you are a single-member LLC, using a single EIN for
multiple locations, everything will be
reported on a single Schedule C.
Use whatever address that you would use to receive
correspondence from the IRS regarding the EIN number as the address for the
business. Then, combine all of your
expenses in the various categories from the three locations and report them all
together. If there is ever a question
about what you have included, you will have your documentation to show which
location incurred the expense.
