Just reading about Roth Conversion and ran across some info about when to start withdrawing.
"When do you need to take your first RMD?
As the rule is written, you need to take your first MRD from your tax-deferred retirement accounts by April 1of the year following the calendar year in which you turn 70 1/2. For example, if you turn 70 1/2 on in January 2016, you'll have until April 1, 2017, before you'll be required to take your first RMD."
BIG CAVEAT
"Two warnings about MRDs
While the rules permit you to wait until April 1 of the year following your 70 1/2 birthday to take your first MRD, that doesn't necessarily mean it's a good idea to do so.
To explain why, consider the following example. Let's say that you turn 70 1/2 this year (2015) and that you calculate your first MRD to be $50,000, which you decide to wait until the last minute to take, so April 1, 2016. Well, because you waited until the next calendar year, you'll have to take another MRD by Dec. 31 in to meet your 2016 MRD requirements. Assuming you'll have to withdraw another $50,000, this will leave you with $100,000 of taxable income for 2016, which is likely to catapult you into a higher tax bracket.
Just to put this in perspective, $50,000 in taxable income translates to $8,294 in federal tax liability, while $100,000 boosts this amount dramatically to $21,071. So, even though you're allowed to wait, it generally is a better idea to take your first MRD in the calendar year you turn 70 1/2."
Info from,
https://www.fool.com/investing/general/2015/09/29/mrd-requirements-for-your-retirement-accounts.aspx I was thinking I had 8 more years, but it's only 7!