ApnaComplex does not directly support payment of multiple bills using one cheque.
Please follow the below work-around/procedure to record one payment against multiple bills:
1) Please record the bills into the portal by going to Expenditure->Bills->New Bill.
2) Now, please go to Expenditure->Vendor payable and click on this icon 
present in actions against the vendor – tool tip of which says make advance payments. Record the payment being made as an advance payment against the vendor in the portal.
3) Now please go to Expenditure->Vendor payable and click on “Advance payments” button present in that page and then click on the ‘Adjust Advance Payments’ icon 
present in actions column. You will get the screen containing the unpaid bills. Now, adjust these amounts against multiple open bills that are recorded into the system.