Upgrade to an industry collection or from an LT product to a full product. The way you upgrade depends on how you got your subscription.
Online: If you purchased your product online, turn off automatic renewal. When the subscription expires purchase the full product or collection online. For immediate access to the full product or collection, download a free 30-day trial to use before your product expires.
Autodesk sales or Reseller: If you got your product from an Autodesk sales representative (US site) or authorised partner, contact them for assistance.