Absolutely not. Tax maps are not legal evidence of size, shape, location, ownership, or boundary of real property, public rights of way, or municipal boundary lines. Only a surveyor can determine your boundary. If, after your surveyor determines the boundary and your neighbor still refuses to acknowledge it, you then need the service of a lawyer. If both parties have conflicting surveys and their respective surveyors and lawyers will not agree, then ultimately the boundary will be determined in civil court.