Comprehensive and Detailed
The functionality is:
* Invoice Matching and Validation (A): Ensures invoices match POs/receipts and are validated before payment.
* Payment Holds (B): Prevents payment but is a result, not validation.
* Invoice Archiving (C): Stores invoices, not validates them.
* Automated Tax Calculation (D): Calculates taxes, not overall validation.
This ensures accuracy, as per the training.