Where can I put expenses for books that I bought for my business?

[DS30]

In TurboTax Home and Business, report it under "Business"> "Business income and expenses" > "I'll choose what I work on" > Business income and expenses.  Then enter all your business information.  You will come to a screen that has "Business Expenses",>"Other Common Business Expenses> Other Miscellaneous Expenses. Just use a description like "Business Books" and enter the amount here. (see screenshot)