Solved
office is approx 128 sq ft. and separate electricity and air/ heat
You cannot deduct the 'rent' that you pay, but if the shed meets the qualifications to be a home office, then you could deduct the separate utility bills for the shed. To deduct the full amount of the bills, the shed would need to be 100% used for your business.
Take a look at the following TurboTax article to learn more about what qualifies as a home office:
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