E-filing Status Not Updating

For two years now I have encountered the problem of my TurboTax Desktop for Mac program not updating the e-filing status to show that my returns have been electronically filed.  The returns were successfully filed, as evidenced by my receiving followup messages verifying that they had been received and accepted by the IRS.  The problem is that the program still considers the returns unfiled.  As a result, I cannot use the program to easily amend the returns at a later date.  I have tried numerous times to get TurboTax to resolve this problem, but so far they have not been able to do so.  It appears to be a logic error in the program, not a problem with my computer.  Hopefully TurboTax can identify the problem and fix it in a future program update.