Deductions & credits

Margin Interest is deductible as Investment Interest Expense.

To input your Investment Interest Expense in TurboTax Premier/Deluxe:

1. Click the Federal Taxes tab
2. Click Deductions & Credits
3. Scroll down to the Retirement and Investments section
4. Click the blue Show More in this section
5. Click Start (or Revisit) next to Investment Interest Expense

Please see attachment for reference.