Q.My Venus Fly Trap Is Yellowing With Black Or No Traps. What Can I Do
It looked very well until it began to get cold. I moved it inside.

Certified GKH Gardening Expert
Unfortunately, your photos did not come through. I am unable to see the damage.
Flytraps will enjoy a dormancy, though they can survive without one for quite some time. If you prefer to keep them active, then it will only decrease their lifespan by just a little.
With the proper environment and care, these plants will enjoy being indoors, just as they would being outdoors! Here are some articles that will help:
https://www.gardeningknowhow.com/houseplants/carnivorous/growing-carnivorous-plants.htm
https://www.gardeningknowhow.com/houseplants/venus-fly-trap/venus-fly-trap-care.htm
https://www.gardeningknowhow.com/houseplants/venus-fly-trap/venus-flytrap-turning-black.htm