The IRS is a huge, nation-wide, dysfunctional bureaucracy, made all the worse I'd expect by the COVID-19 situation. In the best of times the IRS's left hand has no idea what its right hand is doing. If you get the IRS confused you'll spend more time trying to get them unconfused then the time it would take to simply print out and mail in your income tax return. Maybe what you propose would work, maybe not, but mailing in the complete form will work.
