There is one option you can choose that would expedite your ability to e-file, and it is completely acceptable by the IRS. For your transactions that are triggering capital gains, as long as you properly "categorize" them in the system that is truly what the IRS cares most about. So, L/T - make purchase date any date that forces the transaction to be classified under L/T - and same for the S/T items - just enter any date in 2020 prior to the sell date and that will force it to the S/T section.
