In total you should have made 72 payments, including the equity extension. Once these have been made the IP should inform you to stop making further payments (if they haven't -- ask). Then the file will be checked over by the closures team. They check that all payments have been made and all income accounted for, as well as that the creditors have all had the correct dividends. This takes from a few weeks to a few months -- in some cases up to 6 months.