> 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-installation-configuration-and-troubleshooting-solutions/faqs/gst/invalid-hsn-codes-error-in-gst-returns.md).

# Invalid HSN Codes Error in GST Returns

**YouTube:** [How to Correct Invalid HSN Codes While Creating GST Returns?](https://www.youtube.com/watch?v=If6nkAGsbeg)

## How to Correct Invalid HSN Code While Creating GST Returns?

In this tutorial, we will learn how to **identify and correct invalid HSN codes** while generating **GST Returns** in **Logic ERP**.

***

#### **Access the GST Return Module**

* Navigate to the **GST Returns** module.
* Select **GSTR-1** as the return type.
* Choose the **relevant time period** for which you want to generate the return.
* Click the **Generate** button to proceed.

<figure><img src="/files/FWjsNI5xOUQXVBhv0g1U" alt=""><figcaption></figcaption></figure>

***

#### **Export Data to Excel**

* You can either:
  * **Export** the data to an **Excel file** using the **Upload** button, or
  * **Generate a JSON file** for direct portal upload.
* For this process, select **Export to Excel** using the **Upload** button.
* Once exported, the data will be successfully saved as an Excel file.

<figure><img src="/files/BoyZic4CC3I1k5SMBkZm" alt=""><figcaption></figcaption></figure>

***

#### **Upload Excel File to GST Offline Tool**

* Open the **GST Offline Tool**.
* Click **Import Excel** and choose the file you just exported.
* Enter the required details and confirm by clicking **Yes**.
* A **warning message** may appear indicating **invalid HSN code entries** (for example, in **Row 6 and 7**).

<figure><img src="/files/yr1uRwXWc3QTY7RaCnct" alt=""><figcaption></figcaption></figure>

***

#### **Verify Invalid HSN Codes**

* To check the error, open the **Excel file**.
* Go to the **HSN B2B** sheet.
* Locate the **incorrect HSN codes** mentioned in the warning (e.g., in rows 6 and 7).

<figure><img src="/files/p42FrtgttJAidY0dBw7G" alt=""><figcaption></figcaption></figure>

***

#### **Correct HSN Codes in Logic ERP**

* Open the Setup\Setup Items and select **"Setup Harmonious Codes/Descriptions"** module in Logic ERP.
* Use the **Find Filter** to locate the invalid HSN codes.
* Once identified, update them with the **correct HSN codes** and related details.

<figure><img src="/files/QmlGJLnDptBPV8zGxeGn" alt=""><figcaption></figcaption></figure>

* **Save** the changes.

***

#### **Re-Export and Upload the Corrected Data**

* Return to the **GST Returns** module.
* Re-export the updated data into a new **Excel file**.
* Open the **GST Offline Tool** again and **re-import** this corrected file.
* The file will upload successfully, and a **summary** of the uploaded data will be displayed.

<figure><img src="/files/fRpdmU5PvHdA4nyjZEqV" alt=""><figcaption></figcaption></figure>

***

#### **Generate Final GST Return File**

* After verification, click on the **Generate File** button in the GST Offline Tool.
* Your return data is now ready for upload to the **GST Portal**.

***

#### **Final Outcome**

You have now successfully:

* Identified and corrected invalid HSN codes.
* Re-exported and uploaded accurate data.
* Generated a clean, validated **GSTR-1 return** ready for submission.


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