How do I add my daughter as a dependent after I already filed ?

[xmasbaby0]

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

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 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

[SandraM]

You will need to file an amended return to add your dependent to your tax return. However, you'll need to wait for your current tax return to be accepted before you can file an amended return

You cannot e-file an amended return as this cannot be filed electronically.  The form is only filed on paper, so it will need to be printed and filed by mail. 

Please see the following instructions on how to amend your tax return:

https://ttlc.intuit.com/replies/3288565