closing books (newbie)

[meu at mundinho.com.br]

greetings,

after some googling I still couldn't find a solution for that:

1 - at the end of the year I want to close the ledger and start a new file, 
blank slate, but...
2 - how can I preserve the auto filling from the previous records?
e.g. - if I duplicate the file and delete all records, the auto filling 
feature is gone. is there a way to keep it?

tia,

joe karma