Actually, reporting it as a sale of $0 is just flat out wrong. If you work through the asset, when you come to the screening "Did you stop using this asset in 2020?", select YES. Then one or two screens later you will have a screen called "Special Handling Required?" Read the information on that screen so you will understand why I am telling you to click YES. Then click YES.
Note that you will "NOT" be asked for any sales information then.
If the item was not fully depreciated, then you can claim the difference between the depreciation value and the depreciation already taken, as a loss. Otherwise, if the item was fully depreciated, then you have no loss to claim since the item was fully depreciated and deducted from taxable business income already.
