Q.boston fern
I brought my fern inside for the winter and the leaves are so long they are brushing the floor.
Can I trim it a bit without damaging the plant?

Yes, you can clean up and prune back your Boston Fern.
Here are some links to help you.
https://www.gardeningknowhow.com/houseplants/boston-fern/boston-fern-care.htm
https://www.gardeningknowhow.com/houseplants/boston-fern/boston-fern-misting-needs.htm
https://www.gardeningknowhow.com/houseplants/boston-fern/care-of-unhealthy-boston-ferns.htm
https://www.gardeningknowhow.com/houseplants/boston-fern/trimming-boston-ferns.htm