It sounds to me like you need a simplified web page that has only a login and password fields for each driver to fill in, which then redirects to a calendar page where the driver can enter his hours for each day worked on the dates they were worked. This calendar page would then send the information to your database each time the driver pressed the save button.
The calendar page would need a script tied to the save button which sends the information to the company's server and on to the database.
In that way the company could use a program like Quickbooks to receive the information and put it in a format the company could use for payroll and tax purposes. That is, if there is a Quickbooks version for your language and country's tax system?
