I already filed my 2020 taxes then found out that i could of used my 2019 taxes to get a bigger refund, can i amend my return

Did you click that big orange button that said “Transmit my return now?”  If you did that, you cannot do anything to fix it yet.  The IRS began to accept/reject 2020 returns on Friday, February 12, 2021.  You have to wait for the email that tells you if your return was accepted or rejected.  If you do not see an email, check your spam folder.

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, 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. 

 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

This is what may have you confused:

Many people had lower incomes during the pandemic in 2020 due to reduced work hours, layoffs, etc.  Or they received unemployment benefits.   These factors affect how much earned income credit and additional child tax credit you can get on your 2020 tax return and affect your 2020 refund.

There is a “lookback” option that allows you to use your 2019 amounts for earned income credit or child tax credit.   You can choose whether to use your 2019 amount or your 2020 amount.  Choose whichever amount gives you a better tax refund for your 2020 refund.

You can see this and choose in the earned income credit section  in Deductions and Credits. 

You still MUST enter all of your 2020 income into your 2020 tax return, including any unemployment you received.

Please follow these steps in TurboTax:

1. Login to your TurboTax Account 
2. Click on the Search box on the top and type "EIC"
3. Click on “Jump to EIC”
4. Answer the questions until you reach the screen "Do you want to use last year’s earned income?"
5. Note your current refund amount using your 2020 earned income at the top of the screen.
6. Click "Yes", enter your "2019 Earned Income" if the field is blank and click "continue".
7. Compare the new refund amount using your 2019 earned income with the previously noted refund amount using your 2020 earned income.