| AbstractTaxW2 | Abstract base class of tax form w2 classes. |
| Codes | Code class, code and amount for Box 12. |
| Employee | Employee information class. |
| Employer | Employer information class. |
| LocalInfo | Local information class. |
| Other | Other class. Description and amount for Box 14. |
| StateInfo | State information class. |
| TaxW2Request | Tax W2 request class. This requests the W2 tax form from the server. |
| TaxW2Response | Tax W2 response class. |
| TaxW2TransactionRequest | Tax W2 transaction request class |
| TaxW2TransactionResponse | Tax W2 transaction response class |
| TaxW2_V100 | Tax W2 v100 form class. |
| TaxW2_V200 | Tax W2 v200 form class, for tax years >= 2001 |
