In Tally there is two methods for setting voucher number that can be set for any type of voucher say for payment voucher, receipt voucher, sales voucher, purchase voucher, journal and so on.
The user can set voucher numbering as automatic or manual. it it sets number to automatic then it will prevent the duplication number automatically however if the number has been set to manual then it can set “Prevent duplicate number yes or no “
The process is simple
Go to main menu of tally then select Accounts Info then select voucher type.
then go to alter and you will find list of vouchers
now select payment voucher and press enter
If you want to set voucher numbering as manual then select manual as method of voucher numbering
and then accept the screen.
If you set the voucher number to automatic then u may further set prefix and suffix to a voucher that will capture by the tally automatically whenever u are entering a voucher

Nice info ! Thanks !
WHAT IS THE FUNCTION OF SHORTCUT KEY ALT+R
helo frnd ALT+R is the short cut key used to hide the ledger vouchers one by one.It is very useful short cut key for verification.
Hello- having a small issue, new user to ERP9.
My sales voucher or you may say Invoice Number is not continuous. ie for the year 2012 ends at 000555 and starts with from 001 for 2013! kindly advise how to change from current status not effecting the issued vouchers for year 2013. Only that Invoice numbers would change.
Would wish to have the invoice number to be continuous for this year 2013. Even when viewing the outstanding balances of the customers we see the Invoice Nr of this year showing on the previous year, although payment has been made for last years Invoice.
Invoices have been issued and already given out, what is your suggestion for us to do.
Would appreciate your step by step guidance . Thank you
Thanks posting your Kumar,
All step by step guidance is available at http://www.tallysikho.com
How to stop auto numbering of voucher in next year??????????
hi sir.
when enter the vouchers the number is ok ofter the time the vouchers number changer like 1-10 is ok the 12 after it display 33 between 12 to 33 numbers missing how changer the numbers