April 23, 2018 – Orleans, MA — Conklin & de Decker has announced that its 2018 State Tax Guide for General Aviation (“State Tax Guide”) is now offered through an online web-based application in addition to the windows-based program. State Tax Guide subscribers now have the option of staying up to date on any state tax law change that occurs and can compare each state’s tax rates quickly from any mobile device, PC or Mac, without any installations or downloading. In addition, there is a newly added feature that allows users to select minimum or maximum tax rates in the search criteria.