What should I do if I mistakenly submitted a form for 2019, but it was necessary for 2018?

[Anonymous]

if a 2018 w-2 the return should have been rejected.   was it accepted?

if so now you need the 2018 desktop software to prepare the 2018 return. when the 2019 return is processed you'll need to amend that one. 

[diana6626]

Yes, it was accepted. And I don’t understand how to change year of the return. I can prepare the 2018 return but how can I amend return that I already submitted?

[AnnetteB6 · Accepted solution]

You will need to amend the return that was already submitted to change the income and deduction items to your 2019 information, such as your 2019 W-2.  You cannot amend that return to change it to a 2018 return.  Your 2018 return will need to be filed on its own by mail.  

If you did not have any income for 2019, then when you amend it, delete the W-2 completely.  Then, this amended 2019 return will also need to be filed by mail.  

Here are instructions to amend the 2019 return:  How do I amend my 2019 TurboTax Online return?

@diana6626