Before filing, re-check your return to be certain TurboTax did not identify any errors you have not resolved. If you updated your software between the time you provided the input data and the time you went to file, a change may have occurred. For example, you may have entered a estimated or withheld tax payments twice. Recheck all of the data to be on the safe side.
I strongly recommend that you review your actual tax forms when checking for errors. This will give you a more holistic picture of your situation. Here's how: