It sounds like you might need help with this from a tax advisor 🙂
One thing I recommend is that you write down--perhaps in a spreadsheet--how you calculated all the expenses you deduct and where you put them.
Generally when I was advising clients, I would try to steer them away from using the "home office" deduction. It sounds, though, like you might be someone who should.
First, you have a dedicated space for your business at your home. The expenses of that space are "home office" deductions.
Two, those expenses can include depreciation, utilities, internet, improvements, furnishings, and so forth. Alternatively you could set a fair market value (or below) and charge your business rent (and report that rental income, of course.)
Three, whatever you deduct needs to be carefully documented in case the IRS ever challenges it. Historically they have seen a lot of abuse in this area.*
Four, anything you deduct one place obviously can't be deducted twice, so if you deduct something as a business expense, you cannot deduct the same thing as a personal deduction. Taking the standard deduction could be one way to avoid that problem on schedule A.
*Your experience with accountants who deducted things different ways every year and did not give you careful documentation of how and why may reflect this history--or maybe not!
