What is a schedule A of a tax return?

If it is used it is an attachment to the federal 1040 income tax return Schedule A itemized deductions of the 1040 federal income tax return and would be used when it would benefit you if your total itemized deduction amount is more than your standard deduction amount for the year that amount would be total numbers on line 29 and if you choose to use them the number would be entered on the 1040 page 2 line 40a.

Go to the IRS gov website and use the search box for Topic 500 - Itemized Deductions

The following topics are found in the category of Itemized Deductions. Each topic is followed by a corresponding number. To access your topic, select the three-digit number.Should I Itemize?Topic 501Medical and Dental ExpensesTopic 502Deductible TaxesTopic 503Home Mortgage PointsTopic 504Interest ExpenseTopic 505ContributionsTopic 506Casualty and Theft LossesTopic 507Miscellaneous ExpensesTopic 508Business Use of HomeTopic 509Business Use of CarTopic 510Business Travel ExpensesTopic 511Business Entertainment ExpensesTopic 512Educational ExpensesTopic 513Employee Business ExpensesTopic 514Casualty, Disaster, and Theft LossesTopic 515