If you want to set up automatic numbering of vouchers in BUSY, you can follow these steps:
Make sure to take latest backup before make any changes.
Step 1: Go to Administration and click on configuration.
Step 2: Choose the Voucher Series Configuration option and select the voucher type of that you want to enable voucher numbering for, such as sale, purchase, etc. Then, select the voucher series and click on Voucher Numbering.
Step 3: Choose the Numbering Type as Automatic.
Step 4: After selecting Automatic set the prefix, suffix, and Starting No. as per your needs and click on OK to save the settings.