You are covered by a retirement plan at work since you have a 401(k).
You can still contribute to an IRA if eligible however it may not be deductible. Go to this IRS website for information - https://www.irs.gov/retirement-plans/2019-ira-deduction-limits-effect-of-modified-agi-on-deduction-i...
You can contribute to a 2019 IRA at any time on or before April 15, 2020 if eligible.
