Understanding Depreciating Assets

December of 2021 I purchased a furnace for a rental property.  $10,900.  I decided to depreciate it over 5 years since we were thinking about selling and wanted to offset the sale gains. Classified type of asset as F-Rental furnishings. Received $545 depreciation for 2021 taxes.  We sold the property in May 2022.  I was expecting close to $10K in the final depreciation for this asset but turbo tax only calculated $4,142.  Is this a bug in Turbo Tax or am I not understanding depreciation correctly?  Thanks