By "commercial kitchen" I assume you mean you are charging other people to use the kitchen, that is they are paying you rent to use the kitchen.
If so, then you would set up a rental property in TurboTax and deduct the associated expenses as rental expenses. You would enter this in the Federal section of TurboTax, then Income & Expenses, then Rental Properties and Royalties (Sch E). In that section you will see options to enter assets and expenses that are ordinary and necessary for the generation of your rental income.
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