I am 73. I started doing Roth conversions in 2018. I plan to do them every year until my IRA balance is under $100,000. I have one Roth account which contains amounts converted from 2018, 2019 and 2020. Should I keep each year's conversion in a separate Roth IRA so I can keep track of what is taxable if and when I take withdrawals? I have converted $175,000 and the Roth IRA is now $223,000 but I do not know how much of the $48,000 gain is for each year's conversion.
