Tax status is stored on the Account Information Details Screen. It is designed so you can select all accounts with a particular status from a drop down list maintained by the the system. These are general tax status and are not designed to be specific, but if you want one added , please request it from cms@climark.com.
Examples:
Taxable
Non-taxable
Tax Deferred
Gains Only
Unknown
You can use the Investment Selections Report to search on Tax Status.