Clients ask us this question all the time. This article on Ed Slott’s website gives us the answer and goes further by explaining income thresholds for Roth IRAs (single, married, and married filing separately–this one may surprise you) as well as the deductibility of Traditional IRAs.
https://www.irahelp.com/slottreport/can-you-contribute-roth-401k-and-roth-ira-same-year