Under these circumstances, it doesn't matter how you answer this question.  The answer that you provide to this question is only used by TurboTax to determine how much is eligible for rollover and you rolled none of it over.

Technically, none of this distribution was RMD because RMDs for 2020 were waived by the CARES Act.

Thanks for the quick response!

I actually tried it both ways and the result was the same, so it didn't seem to matter.  I hadn't considered the rollover aspect.