Turbotax forms for Roth Conversion?

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Hi,

I made a Roth conversion in Dec 2023 and paid the estimated tax in December.  Since my income was very uneven, Turbotax says I owe a penalty.  (I mapped out my income by month and I always paid over 90% of the taxes due).

I'm new to the tax forms for Roth conversions...  But I know I need to fill out form 2210.  That referred me to an Annualized Income form... 

For the Roth conversion, I'm confused on which forms to file and how to fill out those forms...

Can someone give me some guidance?

Thank you!