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# UAE Tax Shopify - How to add TRN/TIN on Shopify UAE or KSA

If your company is VAT registered in one of the GCC countries where VAT applies (UAE and KSA), you should include your **TRN (Tax Registration Number)** or **TIN (Tax Identification Number)** on every invoice you create.

To include the TRN/TIN of your company on your invoices:

1. In your PDF Invoice - Order Printer account, go to the **Preferences** → **Store Details.**
2. Type in your TRN number in the **Registration Number** field.
3. Click Save.