You can amend your return to this claim mortgage interest, but you don't have to, and it might not provide you with a tax benefit, anyway.
Unless all of your itemized deductions, including mortgage interest, add up to more than your standard deduction, you won't get a tax benefit, and in that case you wouldn't need to amend your return.
Please see the TurboTax Help article What's my standard deduction? to see what your standard deduction is this year.
For more information that might help with your decision, please see the TurboTax Help articles below.