How does the Tag feature work in the Address Book

The “Tag” feature enables you to add a “tag” to address book entries, then “Filter by Tag” to choose from a smaller list. For example, if you have may different IRS and state tax offices in your address book, you can add tags such as “IRS, Ogden”, “IRS, Cincinnati”, “IRS, Louisville”, and so on. Then use the Filter by Tag option to narrow the list to IRS offices, or to a specific IRS office.