Since you are retiring at the end of the month, a Roth conversion will only speed up the taxes you will be owing (if any) on your retirement plan distributions. If you convert this year, your overall income may go in to higher tax brackets, meaning you will pay more overall taxes than if you had just taken normal distributions from your traditional IRA and retirement accounts over time.
There are good reasons to convert traditional IRA money to Roth IRA's - including avoiding the required minimum distributions and having a "better" inheritance. Those questions are best answered with your financial adviser, who can see your entire portfolio and strategize with you about whether it is advisable to convert your retirement funds to a Roth account.
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