Here are the steps you can follow to create signoff group using KTern:

a. To create a signoff item, it is necessary to have at least one existing signoff group. You have the option to assign the signoff item to either a newly created signoff group or an existing one.

b. To create a new signoff group, click on the signoff section of your project, and then click the “+” icon to add a new group.

c. Name the signoff group, and then select the “Add signoff group” button.

d. The signoff group will be displayed in the list of signoffs now.