As fanfare said, your traditional and Roth IRA transaction histories will show which amount went to which type of account.
1. The code-H Form 1099-R represents an amount distributed from a designated Roth account in a 401(k) and was required to be deposited into a Roth IRA.
2. The code-1B Form 1099-R represents an amount distributed from a designated Roth account in a 401(k). Since you said that everything distributed was rolled over, you would need to indicate that you moved this money to another retirement account and that you rolled over this distribution. This rollover was required to be to a Roth IRA. If any amount was withheld for taxes, shown in box 4 or box 12, you needed to substitute other funds to complete the rollover of the entire gross amount of the distribution.
3. The code-G Form 1099-R represents a distribution from a traditional 401(k) account. If the code-G Form 1099-R has zero or blank boxes 2a and 5, and does not have box 2b taxable amount not determined marked, it represents an amount that was required to be deposited into a traditional retirement account, in this case a traditional IRA. If either box 2a or box 5 shows a nonzero amount, it's possible that some portion of this went to a Roth IRA and you would have to determine that from your IRA transaction histories.
