Can I group year-end jobs together by period end, e.g. all June year-ends in one column?
Not currently. There's no built-in way to group year-end jobs by period end: Group by: has no period end option.
As a workaround, sort your jobs list with the oldest period end first, and build filtered views by job type and week or due period to approximate the grouping you want.
How to set it up
- In Jobs, open Adjustments. Under Order by:, tick period end. It's added below deadline, which is always ticked, so drag period end by its handle above deadline to make it the main sort, oldest first.
- Set Group by: to job type, week or due period. Each column then runs in period end order. To show only certain job types, use Filters > Job types:.

- To keep this layout, select Views > Save current state as private view or Save current state as shared view.