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# I’m unable to push invoices to the IRP because it’s asking me to enter UQC. What is UQC and how do I update it?

**Insight:** The **Unique Quantity Code (UQC)** is a standardized code that denotes the unit of measurement for an item. It is a mandatory field that must be specified when generating tax invoices, credit notes, or debit notes. The UQC is also required when submitting invoices to the Invoice Registration Portal (IRP), creating e-way bills, and reporting the HSN summary in GSTR-1 filings.

If the UQC is not updated for the item, you will not be able to push invoices to the IRP portal. To add the UQC for the item:

*   Go to the _Items_ module and select **Items**.
*   Edit the item associated with the invoice.
*   Scroll down to the _Unit_ field and click the dropdown next to it.
*   Choose **Configure Units**.
*   In the _Configure Unit_ page, specify the UQC for the item and click **Save**.
*   Click **Save** again to save the changes made to the item.

Now, try pushing the invoices to the IRP portal.

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