NEW DELHI: The CBDT has extended the due date of filing of quarterly return of payment of interest to residents without deduction of tax at source (Form No. 26QA) under sub-section 1 of Sec. 206A of the Income-tax Act, 1961, for the quarters ending June 30, 2005, Sept. 30, 2005 and Dec. 31, 2005 to April 30, 2006.