You can find blue question marks at the top of certain sections. Clicking on it will provide more information on how to complete the area you are filling out.
Required fields are starred with blue asterisks. If a required field is left blank when attempting to proceed to the next category, you will be prompted to fill in the required information.
You can manually enter the date using your keyboard. A calendar will also appear if you click in that field.
The calendar will allow you to select a date. You can also click on the arrow to the left of the month to select a previous date.