What province do you live in? Most provinces don’t have a rent credit. If you live in a province that does, you will find it in the provincial part of the TurboTax Interview. You can get there by clicking on Provincial, then Provincial Tax Credit Profile in the left side menu.
If you use part of your home for work, you might be able to claim rent as an expense. In that case you would include your rent in either the Employment Expenses, Self-Employment or Rental income section.