I moved my plant inside before it went dormant and now the leaves are turning yellow, but it is still blooming.
Did I Harm My Hibiscus Plant by Moving Before It Went Dormant
Certified GKH Gardening Expert
If you recently brought this plant indoors, this is a normal issue. It is just going through a bit of acclimation shock. When plants are brought in from outside, they need to be acclimated. This article will help with that next time you bring a plant in: https://www.gardeningknowhow.com/houseplants/hpgen/using-pesticides-and-other-chemicals-on-your-houseplants.htm
Fortunately, hibiscus rebound well to acclimation shock. Make sure it is getting enough light and water, but expect that it may shed yellow leaves all winter. This article may help as well: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/wintering-hibiscus-indoors-winter-care-for-hibiscus.htm