Should I Itemize? Topic No. 501 Medical and Dental Expenses Topic No. 502 Deductible Taxes Topic No. 503 Home Mortgage Points Topic No. 504 Interest Expense Topic No. 505 Charitable Contributions Topic No. 506 Business Use of Home Topic No. 509 Business Use of Car Topic No. 510 Business Travel Expenses Topic No. 511 Work-Related Education Expenses Topic No. 513 Casualty, Disaster, and Theft Losses Topic No. 515