Get your taxes done using TurboTax

In my 1998 1040 Tax Return, I had the option either to add the Margin Interest Expent to Schedule A as addtional itemized deduction, or elected the Margin Interest Expense to offset most of my Ordinary Dividends.  For some reasons, I can't do that in Turbo tax for my 1999 1040 Tax Return.  Greatly appreciated for any help and instruction!