> 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/user-access/logic-global-admin/sale/sale-settings-2/do-not-allow-rate-modification-in-sale-bill.md).
# Do Not Allow Rate Modification in Sale Bill
**YouTube:** [How to Globally Restrict Editing of Rates in Sale Bill ?](https://www.youtube.com/watch?v=Q-1XuFGpzao)
## How to Globally Restrict Editing of Rates in Sale Bill ?
This tutorial explains how to enable the setting that restricts manual rate modification in sales billing within the Logic ERP system.
***
### Implementation Procedure
* Navigate to the **Logic** folder and run **Logic Admin**.
* Click on "**Global Settings"**
* Open the **Sales Settings - 2** tab.
* Locate and enable the option labeled: **"Do Not Allow Rate Modification in Sale Bill"**
* Click **Save** to apply the changes.
Let's keep this feature enable to observe its impact in Billing.
***
### **Apply Across Series and Branches:**
* The same option is also available in **Sale Bill Configuration**.
* However, this setting must be configured **individually for each Series** if done from there.
* Note: If you want to disable rate modification for a particular series, then lock the rate column using **Column Locks**.
* To apply the restriction **across all series and branches**, it is recommended to use the **Logic Global Admin** settings.
***
### Validate the Changes
* **Restart the software** to ensure all settings take effect.
* Create a new **sale voucher**.
* Try modifying the rate in the voucher entry.
* The software will now **restrict any manual rate modification**.
As you can see in the picture, rate editing has been disabled.
* Only the **predefined rate in the lot** will be applied—manual entry will be blocked.
### **Key Benefits of Restricting Rate Modification**
* **Prevents Unauthorized Changes** – Stops manual rate edits by billing staff.
* **Ensures Pricing Consistency** – Uniform rates across branches and series.
* **Protects Profit Margins** – Avoids losses due to incorrect pricing.
* **Reduces Errors** – Minimizes mistakes in billing entries.
* **Enforces Policy Compliance** – Aligns billing with company pricing rules.
* **Simplifies Audits** – Easier to track and verify billing accuracy.
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