Just got a Vanguard Corrected 1099 and have already e filed-problem

Unfortunately, while I saved a PDF of my tax return, I dumbly renamed my file AFTER downloading the corrected Vanguard 1099 form so no longer have my original file.  Vanguard no longer has the original 1099 online.

 

With the corrected 1099, I owe significantly more in both Federal and State taxes.  Unfortunately, I have a significant number of investment transactions so simply printing out the PDF and comparing it to each page of a revised form would be EXTREMELY time consuming.

 

Is there a way I can retrieve the tax return that I e-filed on turbo tax, save it, and then more easily do a corrected return or is there no option but for me to do this the "long way"?

 

Thank you