According to the help screen, there is a drop down menu, however I cannot find one. Also going through the setup account process there is no selection for asset class. I am on Reckon Accounts Personal Plus 2013 Release R 1.
Sy, do you mean assign an asset class to an Account or to an individual stock? Assuming it's individual stocks, go to Edit Security, and allocate a type. The various types are listed under Investing/Security Type List - it can be edited to suit your requirements.