Could you please confirm that the procedure explained [here](("[[BL]]https://docs.aspose.com/pdf/net/import-data-from-xml-into-pdf-file/[[/BL]]) is suitable to my needs?
However, we will really appreciate if you can please share the sample PDF document along with complete XML, so that we can log an investigation ticket in our issue tracking system and share our feedback with you accordingly.
The ImportXml method of the Form class has support of processing XFA structure (Adobe XML Forms Architecture). You can get a 30 day temporary license from the purchase portal and its option is available in step 5. A temporary license is a time-restricted full license that lets you test every aspect of the API before buying it. The evaluation version has a limitation to process only 4 elements of each collection. Please refer to these helping links: Apply license to Aspose.Pdf for .NET API and Download the latest version 17.12 of Aspose.Pdf for .NET API
Kindly let us know in case of any further assistance or queries.