Input it here:
1. Click Federal
on the left-hand side menu.
2. Click Deductions
& Credits across the top.
3. Scroll
down to Retirement and Investments and click Show more.
4. Click Start
or Revisit by Investment Interest Expenses.
Go through the interview till you get to the screen below.
Check the box by I have 2017 investment interest expense carryovers.
