Work through each of those assets one at a time. Select YES on the screen for "Did you stop using this asset in 2021?". On the "Special Handling Required?" screen, read the small print so you understand why I am telling you to click YES. Then click YES. The asset must remain on your 2021 tax return in order to show that you removed the item from service. This also stops depreciation on the asset.
You can then delete the asset from your return *NEXT YEAR* on your 2022 return. You can not delete the asset from your 2021 tax return.
