I have a business established in IL but live in UT. My business partner lives in IL. If I want to rent an apartment in IL, can I write it off as an expense?
-Business occurs in IL
-Need to go to IL for a few winter months for work and therefore need an apt.
It depends on why you're going to IL. To be deductible the expense has to be ordinary and necessary to that trade or business. If there's a legitimate business reason then maybe, there are still limitations on how long you can live somewhere before it becomes your tax home. You're going to need to elevate this question to a tax attorney so you can go over it in detail.
If you can make an argument to prove its value as a business expense. You should set it up in a way that it can serve as an office. If you manufacture there, conceptualise and design there, or perform any other related aspects of your work there, then it counts as a business expense.