Once the forms are generated from the Filing tab in the ACA app, the 1095-C forms will be visible for each employee on the ACA dashboard on the Overview tab. You can view or download a form by clicking on the link on the right hand side against each employee. You can also bulk download forms for all employees from the Filing tab.
If there is no form for an employee and it says "Not Required" on the dashboard that means the employee did not qualify for ACA Compliance and a 1095-C form is not required for the employee. If you think an employee has qualified for ACA, you can click on the "Edit" link for that employee and modify the details for each month. The form will get auto-generated only if you have not completed the second step of filing, i.e. review of forms. If you have reached the third step of filing, i.e. sending forms to employees, then forms will not get generated or updated.