How can I pull up the settings app while in talk back mode? I wan it

Settings: set the menu on "talk back" now can not get tablet to pull up ANY aoos, on talj bacj. Particular settings menu. Just want to tun talj back; bacj. Off. Please help. Somehow the. Voicé command will not pull up the settings app so i can turn talj back, back off. Please help asap.