Exactly why do you think it is incorrect?
TurboTax follows IRS Pub 590A worksheets 2-1 to calculate MAGI and worksheet 2-2 to calculate contribution limits.
If you do not want to give your figures then do the calculations yourself using the IRS worksheets and if you find an error, please let us know exactally which line on the IRS worksheet does TurboTax calculate incorrectly and we can report it as a bug. AFAIK there has never been any bug found in this area.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
