My Kenmore Ultra Wash dishwasher will not drain when finished. What are my options?

Remove lower rack. There a strainer under there. Remove and clean.

Make sure there is no other food debris under it.

If that isn't it, then REMOVE POWER.

Unhook drain line from under the sink and under the DW. See if it is clogged or the outlet is clogged.

Otherwise, there is a problem inside the pump. You'll have to dismantle the pump housing to see what's up in there. Before you start this undertaking, you'll need replacement gaskets. This procedure is fairly complicated.

Regards,
Stew