Being "retired" is not a factor, it depends on your age. If you are over age 59½, the amount converted can be taken out of the Roth IRA at any time without tax or penalty. The 5-year conversion clock is only used to determine if taking out the converted funds before age 59½ would result in a recapture of the 10% early-distribution penalty that would have applied if the distribution from the 403(b) had not been rolled over to the Roth IRA. Early-distribution penalties end at age 59½, so after age 59½ the 5-year conversion clock has no meaning.
