Under certain circumstances you can deduct expenses for the business use of your home.
You sell products at wholesale or retail as your trade or business.
You keep the inventory or product samples in your home for use in your trade or business.
Your home is the only fixed location of your trade or business.
You use the storage space on a regular basis.
The space you use is a separately identifiable space suitable for storage.
That's from IRS Pub 587 and you have to meet all those tests.
Your question is somewhat vague. If you're currently renting to yourself that's a zero sum game.
