TT doesn't change the year ... if you tried to use the CURRENT online program the ONLY tax year you can file is 2019. You must not have reviewed the return prior to filing or you would have seen the incorrect year on every tax form.
So if you filed a 2019 return using the incorrect 2018 information so to fix this error you have 2 steps to take.
1) file the correct 2018 return using any method you choose ... get the forms and manually fill them in, use a local paid tax preparer, or buy the 2018 program from some company... but no matter which option you use the return MUST be mailed in ... it cannot be efiled.
2) wait for the incorrect 2019 return to be processed ... it is very possible the IRS will reject the return due to the wrong info ... so all you can do is wait for the refund or the IRS letter. If you get the letter respond that the filing was in error and if you still need to file a 2019 return ask them if they want you to mail in an original return or an amended one.
