LAST DATE OF RETURN

If partnership firm liable for tax audit......... then 30.09.2018

otherwise......31.07.2018 ( date likely to be extended)

Is rent received from non-residential usage/units?

Is interest received is only from bank or any financing business?

Rental services for residential usage of any house property is nil rated under GST,

And if financing is not your regular business, no need to declare the interest receipts.