You can use Semantik to automatically detect and extract line items (tables) from submitted invoices.
When an invoice is submitted, the line item fields are checked against your enabled extraction fields. If a line item is enabled, it will be automatically extracted and populated in the Line Items table for review and export. If a line item is disabled, the data will not be extracted, and will not be available upon export.
You can view and change your extraction field settings from the Fields settings page. Some fields are disabled by default. For more information, refer to Editing Extraction Fields.