I need my 2018 tax return which I just filed with turbo tax im trying to finish my fsafa so I can start school in jan

If you used the TurboTax online editions, those editions are only for tax year 2020 and nothing can be filed using the online editions since tax year 2020 has not yet completed.

To complete and file a 2018 tax return using TurboTax you would need to purchase, download and install on a personal computer one of the 2018 desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/

A 2018 tax return can only be printed and mailed, it cannot be e-filed.

Not sure what you mean "just filed" ... when exactly did you file it ?    Did you mail it ?  Which program did you use to prepare it ?   The Online or Downloaded version ?  

If you used the desktop CD/Download editions installed on your computer, the only copy of your tax data file and any PDF's will be on the computer where the return was created.  TurboTax does not store online any returns completed using the desktop editions.

To access your prior year tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/

Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show.  Click on the Year and Click on Download/print return (PDF)