Answer:
There will be no effect on the Trial Balance if a transaction is totally excluded. An error of omission occurs when a transaction is fully unreported in both aspects, or when a transaction is documented in the books of primary entry but never entered in the ledger.
1. Errors of omission
2. Errors of Commission
3. Errors of Principle
4. Compensating Errors
5. Complete reversal errors
6. Transportation errors
7. Duplication errors