Also, be aware:
You titled your post "Roth 401k" but all the questions and answers have been about a Roth IRA.
401(k)s and other workplace plans are NOT IRAs. IRAs are controlled by different sections of the tax laws and have different rules than workplace plans, and some of the rules for a designated Roth account inside of a 401(k) plan are different than the rules for a Roth IRA.
If you are asking about a designated Roth account inside of a 401(k) plan, you will need to clarify that for us.
