Can I amend tax NOT filed in Turbo tax? There's no option for years not filed in Turbo (in 'Your tax returns

Hi,

I just realized I need to amend 2017, 2018 and 2019 taxes for the same reason, and I'm able to do so because I filed my 2019 tax with Turbo. I followed the instruction to amend 2018 tax but since I didn't file my tax with Turbo before 2019, there's no option in 'Your tax returns