Due date for filing Returns would be:
Individuals: 31st July of the AY. (for AY 2018-19, due date would be 31st July, 2018)
Companies: 30th of September of the AY. (for AY 2018-19, due date would be 30th September, 2018)
For assessees under section 92E, 30th November of the AY. (for AY 2018-19, due date would be 30th of November, 2018)
For assessees not mentioned above: 31st of July of the AY. (for AY 2018-19, due date would be 31st July, 2018)
For your trust, the due date would be 30th of September of the AY. (for AY 2018-19, due date would be 30th September, 2018)