Line 29 is for excess casualty loss, and has nothing to do with depreciation.
Line 41 is the depreciation percentage, not the dollar amount.
There's an IRS Form 4562 that prints in landscape format, specifically titled "Depreciation and Amortization Report'. On that form add together the amounts in the "prior year depr" column and "current year depr" column, to get the total amount of depreciation taken on the property, up to and including 2020 depreciation.
