Assuming your business is a sole proprietorship or single member LLC and you report all business income/expenses on SCH C, I seriously doubt you pay yourself rent for space you already own. You should be claiming the home office deduction.
Even if you don't own your house and actually pay rent for it, you still claim it has a home office deduction and the program will walk you through the process of figuring what percentage of the rent you actually pay for your residence, is deductible as a business expense.
