Yes, you can deduct the purchases as an expense on your return. Because you have the 1099 MISC income, a Schedule C form will be created with your return and the business expenses get deducted on there as well. See the steps below to be brought to Schedule C expense entry. You can enter them as supplies under the Other Common Business Expenses section. See the sample screenshot attached.
https://ttlc.intuit.com/replies/5802554
