Do I dig up my basil or cut back below leaves for winter?
Basil in Winter
Certified GKH Gardening Expert
Basil is a rather short lived annual. You can expect it only to survive the summer and after that it will get woody. It is best to start a new plant for winter to grow indoors (so, yes, you will need to grow it indoors for winter.)
Here are some articles to help you with your basil plant and future basil plants: https://www.gardeningknowhow.com/edible/herbs/basil/how-to-grow-basil-plants.htm