Help plz....

vishnu (articles ) (161 Points)

24 November 2012  

financial year is set to 1-4-2012 to 31-3-2013   i  want to change the date of the  purchase voucher dated 31-3-2013  to 7-8-2012

it was showing date below starting of books error  

please some one  help me to figure me out......