Withholding vs. estimated taxes

[HappilyRetired]

I have had no earned income this year, only social security and some interest/dividends small enough that I was not expecting to pay taxes.  My financial advisor is recommending I move $50k from my IRA into a Roth while I am still not subject to RMD (I am not yet 73).  I used the IRS tax calculator and estimate that this will make most of my social security taxable and result in total federal taxes of about $9k. I have read that I can avoid tax penalties from not submitting estimated payments if I withhold all of the taxes due (or I assume at least 90% to meet safe harbor rules) when I withdraw from the IRA.  Is this the best approach for me?

[Bsch4477]

Yes. Your withholding from your IRA is assumed to have been spread over the 4 quarters.