We have added new fields in the Assignment Schedule section in the people hub worker's record:

When you click Create Assignment, you'll notice two new fields:

"Notice Period" - where you may provide notice period details for that assignment

"Additional Information" is at the bottom, of the page where you can add any extra information needed for that assignment.
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Newly added fields will be available while viewing and downloading the assignment as well:

Also, these two new fields will be available when you try to create an assignment inside the company under Financial Accounting -> Assignments -> Create New.
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