> For the complete documentation index, see [llms.txt](https://kb.logicerp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kb.logicerp.com/logic-erp-learning-hub-tutorials-and-best-practices/setups/configurations/sale-voucher-configuration/other-settings-1/carry-forward-lot-nos.md).
# Carry Forward Lot Nos
YouTube: [How to Enable the Carry-Forward of Lot Numbers in Sale Bill ?](https://www.youtube.com/watch?v=BdWxMx9hRJw)
## How to Enable the Carry-Forward of Lot Numbers in Sale Bill?
In this tutorial, we will guide you through the process of enabling the **Carry Forward Lot Number** feature in Logic ERP, ensuring a seamless billing process.
### Functionality by disabling the Feature.
* Open **Sales Voucher Configuration** from the main menu.
* Select the relevant **Billing Series**.
* Locate the option **Carry Forward Lot Number** and keep it **disabled** for now.
* Proceed with billing to observe the impact—each time you enter a new line item, the system prompts a **Lot Search Window**, requiring manual selection.
### Functionality by **Enabling** the Feature.
* Now, go back to the **Sales Voucher Configuration** and enable the **Carry Forward Lot Number** option.
* Save the configuration and return to the billing screen.
Let's enable this feature to analyze its impact.
### **Observing the Effect in Billing:**
* With the feature enabled, the **lot number** from the previous entry is automatically carried forward to the next line, eliminating the need for manual selection.
As you can see, all LOT numbers have been successfully carried forward.
This feature enhances efficiency by **reducing manual input** and ensuring a smoother billing process.
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