I think an else is missing and I do not think “* 45%” is going to work would be: “*0.45”. And a query about something being identical would be “==”:
if( column("CHANNEL") == "PLATINUM" ) { column("VAS_ADJ_QUOTA")*0.5
}
else if ( column("CHANNEL") == "TERRITORY" ) { column("VAS_ADJ_QUOTA")*0.45
}
else { 999.99
}