Itr filling ay 18-19

Dear Experts,

Since I am going to file ITR of a partner in a non audited firm, I have selected code 00001 under nature of business, a warning arises that a notice may be served for non filling of figure of balance sheet and profit and loss account. Is it mandatory to file balance sheet and P&L for the same catagory of partner??  If  I submit the return without filling of requisite information, what would be happened?