Sorry no. You can only transfer from 2019 at the beginning into a new blank return. The only way now is to start over, go to File-New. Did it find your 2019 return to transfer? You need to have the dat file ending in .tax2019 on your computer to transfer.
Otherwise you will have to manually enter any 2019 info.
Enter a Capital Loss Carryover under
Federal Taxes or Personal (Home & Business)
Wages and Income
Then scroll down to Investment Income
Capital Loss Carryovers - Click the Start or Update button