Not sure what you are asking for. There is not a "short form" now----not since the tax forms changed for 2018 and beyond. If you are a W-2 employee you cannot deduct a home office on your federal return. If you are self-employed it will go on your Schedule C with your other business expenses. What are you trying to do?
Sorry---there is not a deduction on a federal return for that.
Sorry---W-2 employees cannot deduct expenses for working from home. Job-related expenses were eliminated as a deduction for W-2 employees by the tax laws that changed for 2018 and beyond. Your state tax laws might be different.