We are a subcontractor for a residential owner occupied in NYC. This job is not completed yet but the majority of work was completed last September. Our October 2021 Application for Payment was paid in February 2022. - 4 months. Then we resumed work and have submitted 2 more Application for Payments to bill out the job completely. We are currently negotiating some change orders. The balance they owe is $37,894.58, including retainage. We do not want to go back onsite until they pay. The last day onsite was 4/25/22. We are not sure if we should file a preliminary notice or mechanics lien or what to do. Thank you!