Although there are a few ways to add a new task item, the most obvious is to simply click the NEW toolbar icon above the task list on the main screen of the program.
The Date of the task is the day it will start to display and alert you to the need to finish it. Don't put today's date unless you want to do it today! If you know this needs to be done next week, put an appropriate date on this task and let it help you by reminding you to do it on an appropriate day!
Fundamentally, a task only requires date and a description, eg. Call Fred Derf.
Priority is a field used just for sorting today's task list. The higher the priority, the higher on your list it will be. Don't make everything "A" or it can't help you!
An an option, if the task is a bit longer than just a "do it", there is a slider you can use to track your completion of the item.
Group (optional): Can be useful for placing "like" tasks together. Task Groups MIGHT be the name of a project or an employee name you assigned the task to.
This help article applies to Intellect 4 or newer, Time & Chaos 8 or newer, and Chaos Free