<human>: Provide a brief overview of the text.

Basically, TurboTax submitted a different return to the IRS than the return that I approved TurboTax to submit. The return that TurboTax submitted to the IRS was incomplete and missing deductions. I am not sure how unique my case is, but for good measure I am posting it here as a warning. (I originally posted in /r/tax [here]  
  
Here is the situation (using the variable "X" instead of my actual tax payment due):
  
I completed my return yesterday. Right before submitting my return, I downloaded and reviewed all of the information. I made sure it was correct and then submitted it. This process included approving tax payment X to be withdrawn via direct deposit. X is the correct number. The final pdf I downloaded has the correct return along with the message: 

> We just want to thank you for using TurboTax this year!. . .  
> Here's the final wrap up for your 2015 taxes:  
> . Your federal balance due is: $ X. . .

Today I logged in and downloaded all of the files associated with the return. I noticed all of the PDF preview returns showed Y, a different amount than X.  This post-submission PDF Y was several thousand dollars higher than X.  

I called TurboTax, they mentioned it could be due to cookies, but they were optimistic that the version filed was probably the original one that I had agreed to. Then I called the IRS, they confirmed seeing the Y number. I called TurboTax again, but they don't know what to say or do about it. They ended by saying they'd add my case to the research division or something.  

Now I imagine my recourse is filing an amendment in a couple weeks (I should owe less), but the problem here is that TurboTax is capable of sending something different than it shows.

On the potential "browser cookie" cause... I started my return on Chrome earlier in the day, but finished on FireFox.  My internet history (and the literal TurboTax pdf) shows that I finished on FireFox. The missing deductions and submission were completed on FireFox.
<bot>: The version I agreed to file was not filed. Not sure what caused this, but check to make sure you're post filing preview is what you think it is. Don't rely on the final pdf or numbers while filing.