You MUST WAIT for the IRS to finish processing the 2019 return ... they will probably correct the error themselves.
Now for the prior year returns ... you CAN file them now if you wish ...each tax year MUST be filed on the correct tax year forms ...
How to prepare a prior year return
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-prepare-a-prior-year-tax-return/00/25...
