Your primary place of business being based at home does not mean you necessarily can or should actually use the 'Home Office' deduction on your Schedule C (a deduction for a percentage of your rent/mortgage and such, based on % of your home's sq ft dedicated to the home office). The reason this deduction is kind of infamous for increasing the chance of an audit is because it is supposed to only be used for an office space which is clearly demarcated from the rest of the home and used only for the self-employment business. This is not the case in most people's homes - people usually don't have a separate computer on a separate desk, either in a dedicated room or with a line of duct tape surrounding the area on the floor, that they and other family/friends/roommates never use for personal activities when not in use for working on the self-employment business. My primary source of income for the past decade has been home-based self-employment, and I have never used the 'Home Office' deduction, because I don't have a dedicated home office space.