Furniture, such as chairs, computer desks, carpeting, lamps, etc. Books that become a part of your permanent professional library. The amount you expense, however, cannot exceed your total writing income. I've heard varying opinions on whether books should be expensed or amortized. My own accountant is of the opinion that they must be amortized, but I've seen information that states they can be expensed.
Auto expenses Certain auto expenses are also deductible.
You can, for example, deduct the cost of driving from your home to the office supply store or post office, or to an interview, or to a conference or seminar. Again, there are differences of opinion on when and how to deduct such expenses. When such differences of opinion arise, it's best to consult an accountant directly. So you might as well claim what you can. The details of this deduction are too complicated to explain here.