You can't enter information from 2017 on your 2018 tax return. Unless you're referring to something else?
Please read this TurboTax FAQ for additional information
about preparing a prior-year tax return:
How do I prepare a prior-year
tax return?
Please read this TurboTax FAQ for additional information
about clearing & starting over in TurboTax Online: How do I clear and start over in
TurboTax Online?
