Assuming you are self-employed you will need to allocate the costs according to the amount of space used for the business in your home. It would be part of the "Home Office" deduction in TurboTax under the self-employment topic. TurboTax will help with the allocation based on your entries for square footage of the home office and entire home.
However if you are an employee who is working from home, there is no longer a deduction for employee business expenses, including a home office.
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