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IRS
Estimated Tax for Roth Conversion
(generally, 90% of your current year’s tax or 100%–110% of last year’s tax, depending on your adjusted gross income).
Note: Ensure you make payments by the quarterly deadlines (typically April 15, June 15, September 15, and January 15 for calendar-year taxpayers) to avoid penalties. Direct Pay allows scheduling payments in advance, which can help meet these deadlines.
Calculate Tax using rmd_roth_model.
Initiate payment at IRS, from SDFCU checking to IRS.
Note. We could pay from IBKR, but that would expose our account number to a third party.
https://www.irs.gov/faqs/irs-procedures/address-changes
f8822.pdf
to change address
to make a payment
type (checking or savings), routing number, account number