As I said, there is no restriction on 401(k) or 457(b) contributions that is based on the Adjusted Gross Income reported on your tax return. Your employer's plans will dictate the amount that you are able to contribute from each paycheck and the contributions must stop when the total for the year reaches the overall statutory maximum.
https://www.irs.gov/retirement-plans/how-much-salary-can-you-defer-if-youre-eligible-for-more-than-o...
