Over MAGI. Turbotax is not allowing me to claim backdoor Roth conversion without penalty

Due to the fact I make more than the MAGI (married, filing jointly), I am trying to claim backdoor Roth (i.e, conversion from Traditional IRA to Roth IRA). I did in fact contribute $6,000 to Traditional IRA in January 2021 and subsequently converted it to a Roth IRA.  Here are the steps I'm taking to do the IRA conversion in Turbotax:

  1. Sign in to your TurboTax account
  2. Open (continue) your return
  3. Deductions & Credits > Click Edit next to 'Traditional and Roth IRA Contributions'
  4. Select the Jump to link in the search results
  5. Select Roth IRA and Continue
  6. Answer NO on the screen, Is This a Repayment of a Retirement Distribution? 
  7. For total 2021 Traditional IRA I'm entering  $6,000 as on the screen, Tell Us How Much You Contributed?
  8. I'm entering $6,000 on the screen, Tell Us How Much You Transferred (from traditional to Roth)
  9. If you would like guidance for this section, select Fill in Template. *Particulars were entered.*

At the end of all these steps, I'm still assessed a $360 penalty for contributing to the Roth IRA when in fact I am trying to do the backdoor Roth conversion. Makes no sense because according to Turbotax help and Investopedia, the following guidelines/limits don’t apply to backdoor Roth IRA conversions:  Roth IRA Income Limits: For 2021, if your MAGI is $140,000 or higher and you’re single, or $208,000 or higher and you’re married filing jointly or a qualifying widow or widower, then you can’t contribute to a traditional Roth IRA.11