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 on the corner. The IRS does not allow you to take it back.
If you left out a W-2, a 1099G, 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.
Sometimes—not always— the IRS corrects your mistakes, while they are processing 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 e-file or 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.
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
The Form 1040X is scheduled to be available on March 4. The date is subject to change, so check on 3-4 to see if it is ready. Before that, do not change anything at all on your return.
Refer to the IRS Validating your electronically filed tax return for more information.
The 2025 Form 1040X used to amend your tax return won’t be available until the end of next week. You can check for Forms availability by reviewing the TurboTax article When will my individual tax forms be available in TurboTax?
Wait until your tax return is fully processed and you receive your refund or your balance due is deducted from your account.
For more information and instructions, review the TurboTax articles How to Correct Federal Tax Returns, How to File an Amended Tax Return with the IRS and Video: How to Amend Your Tax Return.