" the source of the two transactions was the same 401(k) at the same institution. "
Yes, that's what I was saying is indicated by the Form 1099-R.
The financial institution is going to refuse to send you separate Forms 1099-R because they reported correctly on the one that you already have. As I mentioned earlier, due to TurboTax's limitations, you yourself must split the form into two to be entered separately into TurboTax, one for the portion rolled over to the traditional IRA and the other for the portion rolled over to the Roth IRA. It seems that you reported the entire amount of this particular Form 1099-R as being rolled over to the traditional IRA, causing TurboTax to exclude it Form line 5b entirely.
