# Set Back Date Entry/Modification Locking Schedule
**YouTube:** [How to Configure Backdate Entry and Modification Locking Schedule?](https://www.youtube.com/watch?v=YkLsRLQFx4Q)
## How to Configure Backdate Entry and Modification Locking Schedule?
In this tutorial, you will learn how to **Restrict Backdated Entries and Modifications** in Logic ERP using the **Backdate Entry / Modification Locking Schedule** feature. This helps maintain **Data Accuracy, Security and Audit Control**.
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### Open Locking Schedule Setup
To begin:
* Go to the **User Access Module**.
* Open **Set Back Date Entry / Modification Locking Schedule**.
* This window displays a list of **documents** (e.g., Sale, Purchase, etc.) where locking rules can be applied.
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### Select Document for Locking
* Select the **document** (e.g., *Sale Document*).
* Right-click on the selected document.
* Click on **Settings**.
**Shortcut:**
* Press **F3** to directly open settings.
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### Configure Lock Criteria
* The **Lock for Back Date Entry** window will open.
* Here, you can define various locking rules based on your business needs.
#### Apply Fixed Days Lock
Let’s configure a **Fixed Days Lock**.
* Select the **number of days** to restrict (e.g., 1, 2, 3 days).
* Click **Save**.
**What this means:**
* You **cannot modify existing entries** within the locked days.
* You **cannot create new backdated entries** for those days.
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### Implement with Modification Restriction
Now verify the impact:
* Go to the **Sale Bill Window**.
* Open a bill that falls within the **locked period**.
* Try to **modify and save** the bill.
**Result:**
* The system will **restrict the modification**.
* An **error message** will appear indicating:
* *Entry modification is locked for this period*
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### Implement with Backdated Entry Restriction
Now test creating a backdated entry:
* Create a **new sale bill**.
* Enter a **date within the locked period**.
* Try to **save the bill**.
**Result:**
* The system will **not allow saving**.
* Backdated entries within the locked period are **restricted**.
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### Key Benefits of Locking Schedule
* Prevent unauthorized backdated entries
* Ensure data integrity and accuracy
* Improve audit compliance
* Control user activity effectively
* Reduce risk of financial manipulation
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### Final Outcome
You have successfully learned how to:
* Configure **Backdate Entry Locking**
* Restrict **Modification of Past Transactions**
* Enforce **data security policies**
Your system is now better equipped for **controlled and secure operations**.
