You can't claim a home office deduction unless it is your regular place of business. If you also maintain an outside office, then it will be very difficult to qualify for the home office deduction even if you do some work there.
https://www.irs.gov/taxtopics/tc509
Technically the rules say this
A portion of your home may qualify as your principal place of business if you use it for the administrative or management activities of your trade or business and have no other fixed location where you conduct substantial administrative or management activities for that trade or business.
You can have more than one business location, including your home, for a single trade or business. To qualify to deduct the expenses for the business use of your home under the principal place of business test, your home must be your principal place of business for that trade or business. To determine whether your home is your principal place of business, you must consider:
-
The relative importance of the activities performed at each place where you conduct business, and
-
The amount of time spent at each place where you conduct business.
Your home office will qualify as your principal place of business if you meet the following requirements.
-
You use it exclusively and regularly for administrative or management activities of your trade or business.
-
You have no other fixed location where you conduct substantial administrative or management activities of your trade or business.
It's going to depend on the facts of your situation, and what duties and tasks you perform at home compared to your office.
