Open the add-in from the Home tab, choose a PDF invoice, receipt or bank statement, click Extract data, then Insert into new sheet.
Select your table including the header row (or click a single cell to use the whole sheet), choose fixes, and click Clean data. By default results go to a new "Cleaned" sheet so your original is untouched.
Click Audit active sheet. Click a finding to jump to the cell.
Spreadsheet data is processed inside Excel. Uploaded documents are processed in memory and not stored.