Then one of two things are happening -
You have not entered the exact same information on the other website as was requested on the TurboTax website.
The other website does not have or does not use the exact same forms, schedules, worksheets and calculations as the TurboTax website. TurboTax is required by the IRS to use only IRS approved forms, schedules, worksheets and calculations based on the Internal Revenue Code of the US.
You would have to print out each tax return from each website to compare the information to see where the discrepancy lies.
