I received a lot of good feedback from my earlier thread:
In order to meet ACA income requirement for a family of 2, I plan to convert $60,000 to Roth IRA in 2020.
I will have no other IRAs and I have one non-deductible IRA remaining. I contributed $16,000 to it with current balance: $26,000. I will convert that to Roth in Charles Schwab, and the income portion should be $10,000.
I will close this non-deductible IRA account after that.
I will need to convert another $50,000 from my 401K. It allows partial withdraw. I called Vanguard and confirmed that they could help me to roll that into Roth IRA. I need to create a Roth IRA account there first, and I also need a rollover TIRA as stop over for that $50,000 before it can be converted to Roth IRA. The income will be the full $50,000.
After that, I will close the rollover TIRA account.
I will pay all taxes out of my after-tax account.
I wonder if this will allow me to skip the Roth conversion pro-rata rule because by 12/31/2020, I will not have non-deductible IRA nor the rollover TIRA account.