You can deduct all items which you bought for your business as Professional equipment.
Starting from January 1, 2016, the IRS allows you to elect the de minimis safe harbor. Under this rule, you can deduct all purchases which cost less than $2,500 per invoice or item in the year of purchase.
In TurboTax, in the Business section, you can deduct these purchases under Other Miscellaneous Expenses and describe them as Professional equipment.
Go to Income and Expenses > Business Expenses > Other common Business Expenses > Other Miscellaneous Expenses.
Please read this IRS document about the de minimis safe harbor election for more information:
https://www.irs.gov/businesses/small-businesses-self-employed/tangible-property-final-regulations
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