The document provides step-by-step instructions for uploading UAN based ECR (Employee Contribution Return) on the new PF (Provident Fund) website unified portal. It details the process which includes logging into the establishment portal, selecting ECR return filing from the payment tab, uploading the ECR file with required details like wage month and salary disbursal date, correcting any errors, verifying the ECR, preparing the challan, finalizing payment and downloading receipts. The purpose is to guide users on filing ECR through the unified portal using the new UAN based format.