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# Where do I find the TSE-decommissioning date?

If you have used the **Shopify TSE app** and a cash register has been taken out of service – e.g. due to a change of location, a new iPad, or uninstallation – a **decommissioning date** is automatically saved.

| This date is particularly relevant for the cash register reporting obligation and should be included when reporting to the tax office.

###### How do I find the date in Shopify TSE?

The exact **decommissioning date** is **not directly visible** in the Shopify TSE app. You have the following options:
1. **Contact Shopify Support**You can ask [Shopify Support](https://help.shopify.com/) to provide you with the official decommissioning date for your TSE.
2. **Reconstruct your own end of use**If you remember **when you last actively used the cash register**, you can use this date as a guide.
3. Check the DSFinV-K export In some cases, the last transaction date of the TSE can be traced in the DSFinV-K export – for example, using the last start/end time of a transaction or signature.

###### Are you already using OpenFiskal TSE?

If you use OpenFiskal, you don't need to worry about this:

|| 👉 The decommissioning date is automatically documented and displayed directly in the Meldefluss app as soon as a cash register has been correctly deregistered.

###### Why is this relevant?
When switching to a new cash register or a new provider (e.g., OpenFiskal), you must officially deregister existing cash registers. The decommissioning date is one of the **mandatory details for cash register registration**, e.g. in our [Meldefluss](https://apps.shopify.com/meldefluss) app.

###### Any questions?
If you need help or are unsure about a date, please contact us directly via chat in the app or by email at [help@openfiskal.com](mailto:help@openfiskal.com).