We built the functionality using the Process. See below:

We have a checkbox field on the bottom of the form that asks if they want to save it. In the process the "Save for Later?" gateway looks to see if that value is set to yes or not. If it is, then it assigns the form to the initiator. That will then allow it to show up as a task for that user.

To have the required fields not required, you can use JavaScript like the following to accomplish this.

//make required fields not required if save later box is checked
  $('.saveform input').change(function () {
  if ($(this).is(':checked')) {
    $('span.cf-required').remove();
 $('.req input').removeClass('required').removeAttr('required');
    
  } else {
    $('.req label').append('<span class="cf-required">*</span>');
    $('.req input').attr('required', 'True');
  }
  });
  //end make required fields not required if save later box is checked

I did not come up with all of this by myself and give credit to those that have helped me.