JustTryingToFileMyTaxes

I am trying to file my tax return using the online T2-2021 software and it has set the tax start date to 2022-01-01, when my tax end date is set to 2021-12-31. I can't find where I can fix this and calling support has been unhelpful as the number the website have listed apparently doesn't do support for T2, and they have told me the right people will contact me and no one has.