Will my custodian know what portion of the IRA is basis? Or do I tell them to leave the basis amount in the IRA?
The reason I ask is prior to this scenario, the entire IRA was a pre-tax rollover, I made a single post tax contribution, which I immediately rolled over to Roth IRA (next day) and didn't realize the pro rata rule. So technically, there is no more post tax money (basis) in the IRA (unless you're referring simply to an amount and not a tranche as being "basis".
So Now I'm trying to make the best of it for next year...
