@jvbdvb , correct. If the rollover to the Roth IRA is equal to the amount in box 5, the split Form 1099-R for the rollover to the Roth IRA should have in boxes 1 and 5 the amount from box 5 of the original. The form for the portion rolled over to the traditional IRA should have in box 1 the original box 1 amount minus the original box 5 amount. Box 2a of the original Form 1099-R should have a zero in it, so box 2a of the split forms should also be zero.
Code H only applies to distribution from a designated Roth account to a Roth IRA. Code G indicates that your distribution is from the traditional account in the employer plan, not from a designated Roth account.
If you do not split the form, you will only be able to indicate that the entire amount was rolled over to a traditional IRA or the entire amount was rolled over to a Roth IRA, neither of which is what happened. You must split the form,
