Get your taxes done using TurboTax

So if we do the Roth conversion in December, we can pay the entire tax bill we think will be due on that amount on the Jan. 15 payment, and the IRS won't assess any underpayment penalty?  And the other 3 payments can all be zero?

 

If so, can you explain how to use the annualized method?  I assume there is a form for this?