I need to find detailed information for the case 'C-1/20 - Finanzamt Österreich'. Please locate its full judgment and the Advocate General's opinion, confirm if the full text is available in both English and German, identify its ECLI, and list any related national decisions.
Navigate to the CURIA homepage (curia.europa.eu). In the 'Search for a case' section, enter 'C-1/20' into the 'Case no' field (ID 870). Click the submit button (ID 907) to initiate the search. On the 'List of results' page, locate the entry for 'C-1/20 - Finanzamt Österreich'. Click on the 'Case information' link or icon associated with 'C-1/20 - Finanzamt Österreich' to access its detailed page. On the detailed case page, confirm the availability of the full judgment and the Advocate General's opinion. Check if the full text of the judgment is available in both English and German. Extract the ECLI for the case. Identify and list any links to related national decisions. Summarize the findings regarding the judgment and opinion availability, languages, ECLI, and related national decisions.
The agent successfully navigates to the detailed information page for case C-1/20. The agent confirms that both the full judgment and the Advocate General's opinion are available for C-1/20. The agent states that the full text of the judgment is available in both English and German. The agent provides the ECLI for case C-1/20 as 'ECLI:EU:C:2021:425'. The agent identifies and mentions the link to the 'National decision following the preliminary ruling' if present on the detailed case page.