I took from my taxable accounts first and now take distributions from a mix of IRAs and Roths to almost eliminate income taxes. Here is how I did that. Not everyone can do it my way, but perhaps some could work toward it.
I wanted to reduce income tax when I retired and to do that I needed to reduce taxable income and to do that I needed to reduce taxable accounts and other taxing income. By the end of the first 5 years in retirement, I had done that by selling off the taxable accounts to be used for current income needs and purchased I Bonds equivalent to 20% of my assets which gave an additional tax deferred investment. I Bond fixed interest is not as good today, but I would still consider them. Then a person could purchase $30,000 a year per person, but today you can't buy nearly that much... I would also consider municipal bonds. I also wanted to reduce my traditional IRA account balance so I converted about 20% of that balance during these first 5 years in retirement to Roth IRAs.....about 4% in each of those years. I paid the taxes then on that so that I don't have to pay taxes today.
So after those 5 years, I had about 55% in IRAs, 20% in I Bonds, 20% in Roth and less than 5% in taxable accounts. For income needs beyond Social Security I take from the traditional IRAs up to the point where taxes would be paid, then take from the Roths for the final income needs.
The result has been that for the last 8 years my income taxes have been in the 0 to $350 range each year and should continue that way. I could pay zero taxes each year by taking a little more Roth out and still maintain the Roth balance, but I don't mind paying that small amount. By the way, my Roth accounts have grown to where they are now 35% of my investments, so taxes should continue to be near zero.
“I fear the day technology will surpass our human interaction. The world will have a generation of idiots.” | ― Albert Einstein