In your Section Home page, check the box next to assignments for which you want to add extensions (A). Then click manage dates (B).
Click the extensions tab (A). The in bulk (B) tab is automatically selected. Select the students whose extensions you want to add or edit (C), click edit (D) next to each category and enter the new information. Click save (E) before exiting.
Note: If you set the student extension due date beyond a previously set date of delayed feedback for the assignment, you will prompted to confirm or change that feedback date in order to prevent the student with the extension from receiving answers from other students to whom feedback has already been revealed.
You can also edit extensions for assignments separately by selecting the individually tab (A). Select add (B) under the extensions column for each assignment you want to edit.