You can’t claim expenses for windows replaced on your 2021 tax year return, but you can claim them on your 2020 return.
Please see the TurboTax Help article How to amend (change or correct) a return you already filed for instruction on how to amend your previously-filed tax return.
If you haven’t filed your 2020 return yet, see the TurboTax Help article How do I prepare a 2019, 2018, or 2017 tax return? for more information.
