With your retirement accounts, you’ll want to make sure you know how much is enough to withdraw from your account as well as the date your withdrawal must be made by every year in order to avoid a significant penalty of 50% from the IRS. In the year your first Required Minimum Distribution (RMD) is required (generally, the year you turn 70½), you have until April 1 of the following year to take it. After the first year you reach age 70½, and for every year thereafter, you’ll be required to make your RMDs by December 31.
The IRS has online resources that can help. IRS Publication 590-B covers IRA distributions including the RMD. Visit IRS.gov