We are a steel contractor with a contract to fabricate and erect an industrial project in TN (private sector). Our customer is a General Contractor who is working for the owner. We are nearing the end of the project and our customer has been slow to pay and we have ~$250k in Change Order Requests outstanding. I want to ensure that we preserve lien rights because we may need that pressure to get paid and / or get change orders approved. If work commenced on 4/3/2020 do we still have lien rights?