Just use the 1099B worksheet button at the top of Sch D, scroll down past the brokerage info and you'll find a entry screen similar to the old Sch D.   If you use Inherited as the purchase date, it will print that on the 8949 and automatically make it long term.

But if you double click on the entry line, it will open a separate worksheet, you may find a place in there for inherited property....its got a bunch of stuff in there, but you really dont need it.