This account was permitted to be moved only by nonreportable trustee-to-trustee transfer to the inherited IRA. If the check was made out to the new inherited IRA, the S&L mistakenly generated a Form 1099-R (which is not uncommon because bank front office representatives are notoriously inadequately trained in such matters).
If instead the check was made out you you personally, no rollover to the Merrill Lynch account was permitted and the deposit into that account represents an excess contribution that is subject to penalty unless corrected by a return of contribution. TurboTax is programmed to know that a distribution paid to a non-spouse beneficiary is not eligible for rollover, so TurboTax will not permit you to indicate that the distribution was rolled over.