Did you really click that big orange button that said “Transmit my return now?” If you did that, you cannot do anything to fix it yet. You have to wait for the email that tells you if your return was accepted or rejected.
You cannot change or add anything on the return that you just e-filed, nor can you stop it. It is too late, just like when you put an envelope in a US mailbox.
If you left out a W-2, or a dependent, or a 1099 etc…DO NOT change your return while it is pending. The changes will go nowhere.
Now you have to wait until the IRS either rejects or accepts your return. If your return is rejected, you will be able to go into your account and make the necessary changes to your tax return and re-submit your return.
If the IRS accepts your return, however, then you have to wait longer until it has been fully processed and you have received your refund. THEN you can prepare an amended tax return and mail it in. You have to be able to work from that return exactly the way it was when it was e-filed originally. You will need to use a form called a 1040X. You cannot e-file an amended return. They have to be mailed, and it takes at least 2-4 months for the IRS to process an amended return. Meanwhile, DO NOT go in and start changing anything on your return in the system, or you will make a mess for yourself. Sit tight and wait until you see what the IRS does with the return you just e-filed
IS FILING BEFORE THE IRS STARTS PROCESSING RETURNS REALLY WISE ???
Although TurboTax will allow you to e-filed some returns as early as 1/2 they are NOT sent to the IRS. TurboTax stores those early filed returns until the IRS opens for business and pulls the returns for processing (Currently the start date is 1/27/20 but subject to change) ... only then will you get an e-mail telling you if the return was accepted or rejected by the IRS.
Only the simplest returns can be transmitted to TurboTax early. Some forms will not be finalized until Jan 25 and some later than that.
Why does TurboTax allow early filing? Because their competitors do - It is a marketing ploy to capture market share.
Filing early with TurboTax before the IRS opens is a really BAD IDEA for many reasons...
1) If you discover something that is wrong on your return, receive a W-2 that is different, receive some other tax document that was not on the return that you filed then there is NOTHING that you can do about it other than wait to see if the IRS accepts or rejects the return after they open. If rejected you can correct and file again, but if accepted then the only remedy is to amend which can take 4 months to process.
2) You must remember to check back after the IRS opens (or check for an e-mail) to confirm that the IRS has accepted or rejected the return. If rejected, then it was never filed at all and must be corrected and re-filed. Every year many taxpayers that file early, forget to check back and only discover months later that they never actually filed because if was rejected by the IRS but they had forgotten about checking back after filing with TurboTax.
3) While the IRS does conduct some pre-opening tests and does accept some returns early (ONLY for TESTING purposes), they will not actually process those until after the official opening date. There is a reason to test and that is to discover any problems with it's systems. A couple of years ago a test went bad and several thousand "test" returns were lost. The IRS was able to recover those but it delayed refunds for some by months.
There is no real advantage to file before the IRS opens but there are several disadvantages to do so.