Probably not. Did you turn 70 1/2 in 2016 or will you in 2017?
If you have mandatory withdrawals, that means you have a Traditional IRA and are 70 1/2. You can no longer make Traditional IRA contributions in the year you turn 70 1/2.
https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-ira-contribution-li...
If you turn 70 1/2 in 2017, you can make a Traditional IRA contribution for 2016 (by 4/18) if you still have earned income/ compensation.
