Online is only for 2019 returns.
If you actually submitted and filed with the wrong info or left something out etc., then you have to wait until the IRS Accepts or Rejects it. If it Rejects you can fix it to be for 2019 and resend it. BUT if it is Accepted then you need to wait for the IRS to fully process your return and you get the first refund or pay the tax due. Then you can fill out an Amended Return 1040X and change everything to be only the 2019 info. So if you have filed DO NOT change or enter anything else into your return until you find out if you have to amend.
Again DO NOT CHANGE or enter anything into your return if you already filed. You will have to start the Amended return with the original return that was filed. How to amend 2019
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577
You can check your efiling status here,
https://turbotax.intuit.com/tax-tools/efile-status-lookup/
