I filed my w-2s but after they told me how much my refund was i remebered that i didnt file my other w-2s from my other job

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.

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 about 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

If you didn't file your return, follow the steps below to add you other W-2:

1. Log in to your account.
2. Go to Federal Taxes.
3. Go to Income and Expenses.
4. Click Edit next to Job (W-2).
5. On the screen Here's your W-2 info click Add a W-2.

If you already filed your return you can't make any changes. You need to amend your return and add the other W-2.

If your return has been accepted, wait until your return has been fully processes and you received your refund ( if you are expecting a refund ), then amend your return. 

Here's how you amend your return:

1. Sign in to you account.
2. Scroll down to Your tax return & documents , select 2019 and then Amend (change) return. 
3. Select Amend using TurboTax Online.
4. Follow the instructions, your refund or tax due will change to 0. This is normal on amended returns.

Amended return can't be e-file, you need to print it and mail it in.