If I find a Roth 401k for next year, given a similar situation (i.e. decreasing traditional 401k contribution to accommodate a health insurance premium deduction), can I then, in addition to that 401k contribution, make a contribution to a Roth 401k in the amount of the health insurance deduction? Also, my understanding is that I can make contributions to 401k for 2023 up until April 15, 2024. Couldn't I set up a Roth 401k before then and make a 2023 contribution into that account?
