Hi, welcome to GoY, umbrella plant to me, means either Cyperus alternifolius, or Schefflera, this plant doesn't seem to be either, more like a ficus, but I can't decide which one, if it is a Ficus, then they need a fair bit of water in the growth period, and kept just moist in winter, in growth, apply a high nitrogen feed about once a month, Derek.

Actually, it is a Schefflera, but it's hard to tell with all those big leaflets hanging down. It does look like it was overwatered, too. If it was me, I would start with a new plant in a new pot, soak the soil thoroughly when I watered it, make sure that there is no water remaining in the saucer after watering, and let it dry for 3-5 weeks between waterings, depending on the temperature and humidity in the house.

Thanks y’all for the responses ! I appreciate the help ! We hate to lose this big guy but seems I’m not a plant expert quite yet.