Home Office

If you use a room in your home exclusively for business, you can deduct the expenses associated with that office, including utilities and repairs.

Advertising

A sole proprietor usually has to make some type of expenditure to advertise her business every year--this expense can be written off on your taxes.

Business Rental Expenses

If you rent business equipment or a storage unit to hold your products, you can deduct this cost on your taxes.

Travel Costs

As a sole proprietor, whenever you take a business trip you should keep all of your receipts from the trip and document the type of business that you are handling during your travels. This could include car expenses, hotel, meals, tolls and parking.

Professional Fees

If you have to hire a lawyer to handle business-related matters, this is another write-off on your Schedule C.