The employer needs to know the complete address of the employee for a number of reasons. One is for payroll purposes. Setting up an account for a person requires him to provide his address. Another reason is that if something wrong happens, they would know where to locate him or his family. The company also needs an employee's address so that they can be certain of his identity. And another reason would be for mailing of anything necessary purposes.
You will need to choose the languages and programming solution according to the web applications and the demands of the consumers. To create visual template web forms, you should use ASPX in the visual studio. You will have to route each incoming form templates and manage them for each page you are working on.