@superlyc I would check the safe harbor, from what you describe with your increase in withholding already, maybe you met 2024 tax and you don't have to worry about estimated tax.
to @NCperson's point Form 2210 AI method is a pain but provides that ability to handle unexpected income late in the year to line up with one-off ES. Q4 Roth conversions is another example. IRS still expects you to plan and pay tax timely. The 'pain' in the AI method is you have to calculate your AGI, withholding, qualified divs and LTCG by quarter (3/31, 5/31, 8/31, 12/31) which TT can't do automagically, you have to work all that out and input it.
