Go to Parties or Items and use Export to download everything as a CSV file, or Import to upload one. The import expects the same columns the export produces, so exporting first — even an empty list — is the easiest way to get a template with the right headers.
Each row is validated on its own during import, so one bad row (a missing name, an invalid GST type) is skipped and reported without blocking the rest of the file from importing.
