NRL FootyTAB Winners and Margins approximates are available from the NRL FootyTAB page (Menu > Sports > NRL FootyTAB) after the penultimate leg of the bet has been resulted, i.e., after match 7 has resulted in an 8 match round.
Simply select the drop-down when the 'Approximates Available' is shown next to Margins and Winners

For more information on rules, results and placement of NRL FootyTAB bet types, visit the NRL FootyTAB betting and results page.