Thank you DavidD66,
After further review of IRS "instructions for Forms 1099-R, Table 1 Guide to Distribution Codes, Code Q seems to fit best:
Use Code Q for a distribution from a Roth IRA if you know that the participant meets the 5-year holding period and:
Code T is very similar:
Use Code T for a distribution from a Roth IRA if you do not know if the 5-year holding period has been met but:
Thank you so much for your response, either code yields the same tax result for me but Q is more appropriate. I'm speaking with a Vanguard Rep at the moment, they are trying to direct me to self certify with by using form 5329. I may update with results later, I'm asking them to tell me what Vanguard needs from me to correct their 1099-R
