Incorrect values may well have been selected in the invoice and so brought down incorrectly. To resolve this:
Select the checkbox at the left side on the blue detail line header.
Click the dustbin to delete all the detail lines below.
Click the pencil (draw) button on the blue detail line header.
For each item in the floating window double-click the corresponding text/amount in the invoice area for the first line item and after all have been done, click the green tick.
Capture will copy all recognised lines to the detail area below.
Repeat steps 3 and 4 for any other lines not picked up the first time (perhaps multiline entries)
If an invoice line is VAT Zero-rated, leave LI_VATRate as 0.00, enter 20.00 otherwise.
Following the steps above will allow Capture to process and learn from these invoices make it it easier to process next time. Kofax provides detailed help and explanatory videos on this topic.