Back Door Roth IRA

Greetings.  I seem to be having issues processing the "Back Door Roth IRA".  I felt I did this right and it says "my income is too high" and it is treating this as an excess contribution.  I pulled up the TurboTax article "How do I enter a back door Roth IRA Conversion" and I can't replicate the steps from the article.  Is there a way to delete all of the information entered for this section and start from scratch?  I believe earlier in the process I entered details from a 1099-R.  Likewise, how do I delete all of this previously entered data to try again for this segment as well?  I am open to any suggestions.  Thank you.