Turbotax version

I found that I need to amend my 2021 tax, which was done with an Online Premier version I paid for.  However, when I try to amend my 2021 tax file, it tells me this can only be done with a 2021 Desktop version.  Since I already paid for the 2021 online version, should I be able to get the desktop download for free, or at least with a discount?