In the previous article, we showed you how to set up OSS in Flexi from 1.7.2021. Now we will show you how to generate the OSS return output and how to verify its accuracy.
OSS Reports
OSS outputs are submitted quarterly (monthly in the import scheme) and are available from version 2021.8.
The OSS return can be found in the menu Accounting - Accounting Outputs - OSS Tax Return:
If multiple OSS schemes are enabled in the company settings, select the scheme for which you are currently filing the return:
EU scheme - when selecting this type, no additional information needs to be filled in
Non-EU scheme - fill in the VOES (VAT identifier for entities registered under the non-EU scheme) and OBAN (international account number without spaces)
Import scheme - in order to select this return type, it must be generated for a specific month, not a quarter. You will then need to fill in IN (the IN identifier for entities registered under the import scheme in the role of Intermediary, consisting of the characters "IN" + 10 digits. Fill in if the importer is represented by an intermediary) and IM (the IM identifier for entities registered under the import scheme, consisting of the characters "IM" + 10 digits)
The next window displays a pre-filled exchange rate as of the last day of the quarter or month (if already published), which you can change if needed:
Once filled in, click the Next button:
Here you can view a table of line items included in the OSS return, as well as totals by country and currency or by individual lines.
By checking the Return in XML checkbox, an XML file will be generated and saved to the folder selected in the target file field, which you can then submit.
WARNING: If the XML file you upload to Moje daně returns an error, we recommend checking for and removing any spaces in the IBAN account number for OSS. You can make this correction under Money / List of Bank Accounts.
Verifying the Accuracy of the OSS Return
Verification can be performed in the menu Accounting - Accounting Outputs - VAT Basis, where you can choose to retrieve documents by Other EU Countries or by selecting individual countries:
The following print outputs are available - VAT Basis for Other VAT Countries (summary lines only) and VAT Basis for Other VAT Countries, which serves as the underlying document list for transactions included in the OSS scheme.
The VAT basis line items for other VAT countries should ultimately match the line items included in the OSS return.








