If someone in November 2020 realizes $100,000 in additional 2020 income through converting that sum from a traditional IRA into a Roth IRA, besides the tax consequences or a higher marginal tax rate for 2020, is that taxpayer also liable for any penalties for not having made quarterly tax payments in 2020, or can a full payment of the estimated new tax payment on that $100,000 by January 15, 2021 avoid any tax penalty? If so, what mechanism can be used to make that estimated new tax payment on that $100,000 by January 15, 2021?
