Oh boy---did you really click that big orange button that said "Transmit my return now?"

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. The IRS will start doing that on January 27. Until then, you cannot do one thing to fix this.    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

You cannot change or add anything on the return that you just e-filed.  It is too late, just like when you put an envelope in a US mailbox.

Now you have to waituntil the IRS either rejects or accepts your return after Jan 27 when the irs starts processing returns.  If your return is Rejected you can go back into your account and fix it, then resubmit it.

But if the IRS Accepts your return you have to wait even longer for the IRS to fully process your return and you get the first Refund.  You will still have to pay the tax due if you owe on it. THEN you can prepare an amended tax return and mail it in.