I have a shapefile for Parcels but the whole thing seems to be divided into polylines rather than polygons. I'm trying to create an existing land use map. I was hoping there is an easier way to convert multiple polylines to polygons rather than going through each one by one and merging them in editor?
Try using the Feature to Polygon (Data Management) tool
QGIS has a Polygonize tool under the Vector Geometry tools section that is worth exploring, and can be used with different file types.