The proceddure is not so simple and small to explain here, depends on for what kind of goods you need. You have to do various other thing before you can apply for EPCG (Export Promotion of Capital Goods)
You shall have to approach DGFT from where the EPCG was issued and submitt to them the dtls of complete exports made by you during the term allowed in the licence.
You shall have to show break up of y-o-y exports and any short fall as per the format in the FTP.