My husband died and I inherited his 401K. I rolled it all to an IRA. Why is the program telling me that I had to take an RMD? The 1099R is in my name.

My husband died in October. I inherited the 401K as surviving spouse. I rolled it all to an IRA  and I received a 1099R in my name indicating in box 7 (4G) for death with rollover. The tax program is asking me how much of that was an RMD but since I did not withdraw any of it, I put zero. Then it wants to know what natural disaster I experienced to not have taken an RMD. Also, his company switched management of his 401K fund  mid year. I got 2 1099Rs for him for the same 401K - one from each management company. His benefits dept. told me all of the mandatory RMDs for the year were met within the 1st 6 months (while under Vanguard) so the 2nd half of the year, (Northern Trust) none would have been required to be taken out. So for the first one I answered yes to RMD, but the 2nd I answered no.... the second one (where I answered no to the RMD) is also where the inherited 401K was transferred from.