Income tax from house property

I have only one house as on date, which is in my possession & there are other two flats, which are under construction properties. The said Flat has been given on company lease & I am receiving the lease amount in my bank account after deduction of TDS @ 10%.

My query is that “Since one property I can keep as self- occupied” so is it necessary to declare the above property as wholly let out or can I declare this as self- occupied property to save the income tax on this?