https://help.tallysolutions.com/docs/te9rel60/Tax_India/VAT/andhra_pradesh/AP_Ret_Transaction.htm

Return Transaction Book (Andhra Pradesh)

The Return Transaction Book displays the list of saved returns. Each time the Form VAT 200 is modified and saved, the details are displayed as a separate row in this book as shown below:

If Yes is displayed in Is Modified column of this report, the Form VAT 200 report displays a message about the changes made in the return, and prompts you to recompute the values.