To skip and extend an extendable deadline task, such as a "Respond to Non-Final Office Action - 3 Month Deadline" or "File Section 8 & 15 Declaration - 6 month Deadline" tasks, set the Task Status to “Missed”. This will close the task and create the next deadline in the sequence. For example, missing the 3-month deadline will create the 4-month deadline. Missing the 5-month deadline will create the final (6-month non-extendable) deadline. The following step explain this process:
The following video explains these steps in more detail.