I did my 2018 taxes form, but the app shows me it was 2019 form...

[VolvoGirl]

Yikes!  Did you file it yet?  Were you trying to do a 2018 return?

You now have a problem.  You have to file each year separately.  Online is only for 2019.  You have to wait and see if your efile gets accepted.   If they reject it for something you can change it around to be only for 2019

But if they accept it you need to wait some more for it to fully process and you get the first refund.  Then you need to Mail in an Amended 1040X return to change it to be for 2019.

You can check your efile status here   https://turbotax.intuit.com/tax-tools/efile-status-lookup/

How to amend an Online return

https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/

Amended returns can only be MAILED not efiled. 

Then You still need to do 2018.  To do 2018 you have to buy the Desktop Download program here

https://turbotax.intuit.com/personal-taxes/past-years-products/