For the best advice, I recommend reaching out to your accountant to see the best course of action with recording home office depreciation expenses.
In the meantime, you can always check out, Manage fixed assets using Fixed Asset Manager (FAM) to see if this tool in QuickBooks would be of use to you and your business. The Fixed Asset Manager is a tool within the product that computes depreciation of fixed assets based on the standards published by the IRS.
Please let me know if there's anything else that I could assist you with. You can always reach out to the Community or me anytime you find you need a helping hand. Take care and have a nice day ahead!