It depends. According to the IRS FAQs - Simplified Method for Home Office Deduction,
"For taxable years in which the simplified method is used, the depreciation deduction allowable for the portion of the home used in a qualified business use is deemed to be zero. Accordingly, you do not have to recapture any depreciation for taxable years in which you used the simplified method. However, you may have to recapture depreciation for taxable years in which you used the standard method."
For the years you used the standard method, you can use the total of Prior and Current Depreciation from last year, shown on Form 8562 Depreciation and Amortization Report (this is not an IRS form). Home office assets have code H beside the asset description.
Much appreciated, thanks. Under the Prior Depreciation Column for 2020, the last of 10 years for which I took the home office deduction while I owned the home in question, there is a dollar figure. Is this the cumulative figure for the total number of years I took the home office deduction while I owned the home or is that figure for JUST the year 2020? Do I need to go back and analyze every year's return "Depreciation And Amortization Report"? Then add up all of those figures to get the total depreciation? Thanks.
The depreciation should be accumulated, but you can check a 2019 return to be sure. Don't forget to add any 2021 depreciation, should it apply.