TaxChopper is a situation-based/interview-based tax software rather than form-based.
You enter all your "raw numbers" into the system through necessary web pages and the system will calculate and generate all tax forms for your tax return.
You can use Interview Setup page to tell the software what kind of numbers you have, then the matching pages will be available.
Then you just get to the page and fill out with your numbers.
The picture shows an example of how you get a page available. You can also watch a whole process of a typical return on youtube.