Nobody should retype an invoice.
Let the machine read it, and a person check the doubtful ones.

1. 1
   Invoice received

   By email, upload or a phone photo.

2. 2
   Read

   Text and layout read from the PDF or image.

3. 3
   Fields extracted

   Supplier, date, amount, tax, category.

4. 4
   Booked

   Into your accounting tool, with the PDF attached.

5. 5
   Doubtful? A person checks

   Nothing unclear is booked on its own.

The invoices are examples. Every extracted field can be checked against your supplier list and past invoices before anything is booked.