Ok ... well first for the incorrectly filed 2019 return ... you must WAIT for the IRS to finish processing the return before you can file your 2019 return. Most likely they will send a letter explaining why the 2019 return cannot be processed ... at that time you can address this issue. Post back when you get the notice for further instruction. However, if the IRS actually processes the return and sends the refund then you will need to amend it to file the 2019 return correctly... you may wish to seek professional assistance if this is more than you feel comfortable doing.
Now for the 2018 return ... technically it has not really been filed ... so you can do it now ... How to file a prior year
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-prepare-a-prior-year-tax-return/00/25...