Data people...I need a list cleaned. Can you help me?

The task is to tag for deletion, the cases on my data sheet that are settled, and where they sold the property, so I can perfect my data in my CRM (Go High Level), so we prospect opportunities. To do this, you need to look up the case number and required you can access the sites from your country of origin either directly of through the use of a VPN.
No exceptions!
I have attached a sample file so you can see the scale.
Only detail oriented, highly organised persons will be considered. Let's see if we are a fit!