Thanks for your response. That was the path I was on, but got stuck. I open each parcel individually, open the Parcel Details, and click the Lines tab. I can interactively add new lines, but I am unable remove existing segements, "Delete Rows", as it is grayed out. I guess I'm struggling to reshape or delete existing line segments.
Of note, I don't have survey measurements for most of these parcels with errors so I can't just enter the correct values.