The Return Transaction Book displays the list of Saved Returns. Each time the Form VAT R1, Form CST 1 is modified and saved, the details are displayed as a separate row in this book.
To generate the return which was saved, select the required row and press Enter. The Form VAT R1, Form CST 1 report gets displayed. If the status is displayed as Yes in Is Modified column of this report, the Form VAT R1, Form CST 1 report displays the message of changes made in the return and prompts to recompute the values.