As a general rule, if an entrepreneur wants to claim a tax deduction for a home office, What do they need to do?
1) Send a letter to the Internal Revenue Service informing them of the home-office location
2) Place a sign in their front yard indicating they are operating a business out of their home
3) Add supplemental coverage to their homeowner's insurance policy
4) Devote a separate space to the activities of the business in their home