I am trying to figure out the amount of taxes I am going to have to pay on a Roth Conversion I just completed. I have a 401k through my employer. In 2016 I opened a traditional IRA account with Vanguard and contributed 2750$ (all non-deductible contributions) in Dec 2016. (This is probably not relevant, but I I also opened a Roth with Schwab at the same time and contributed the same amount to it) . Then an additional 300$ (nondeductible) to the Vanguard IRA in Jan 2017. Then I left that account untouched until this month (April 2020). The balance had grown to 3329$ by then (the market value was 3404.15$ on Dec 31st 2019) . I contributed another 5500$ this month, April 2020, (again, all nondeductible) and immediately converted the whole account to a Roth with Vanguard (total account value of around 9000$). What kind a tax liability resulting specifically from this conversion am I looking at when I file my return for year 2020?
