Backdoor Roth IRA
Getting your backdoor Roth IRA right is very tricky. If done incorrectly, you can find yourself owing a ton of money and more than negating the value of contributions.
Here’s the best/most correct covering of the topic:
Here is a higher-level discussion:
https://www.dadsdollarsdebts.com/2016/11/22/roth-401k/
Also look here for much more in-depth information: