My federal return was accepted and the filing instructions say to mail in Form 8453 with the Sched D continuation. However, I uploaded this electronically in the middle

of the TurboTax interview when I was entering my stock sales.  Turbotax said that since I uploaded the file as a PDF, they would send it in electronically for me.  However after filing I am still instructed to mail in Form 8453, even though the pre-filled out 8453 was not included ithe printed/saved version of the tax return package.  Is this a bug or am I doing something wrong?