NO!  You cannot amend your return the day after e-filing!    

 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

You will not be able to amend your return online. TurboTax Online for 2017 will shut down permanently after next Monday. You will be able to download special amendment software and install it on your computer. You will use that to amend your return. But you will need the .tax2017 tax data file for your return in order to amend it. Download the .tax2017 file NOW so that you have it when you are ready to amend. Otherwise you will not be able to access it until sometime in December.

Thanks.  The initial e-file return was accepted and now I see that there is an amend link available.  I was able to amend my return, print it and sent it in.

So you did that anyway even after being told not to?  Hope you do not confuse the IRS too much.