To remove entries you've made in the Contact Log, you'll need to clear, or purge, your company file of business contacts.
You can purge your company file of business contacts at any time. You should perform this procedure at least once a month, especially if you record many business contacts during the course of a typical business day.
Note: Contact log entries aren't purged during the Start a New Fiscal Year process; you must remove them manually. (How your company file is changed when you Start a New Fiscal Year)
Step by step