Severance offer, what should I ask for? after 5 years as a bookkeeper

My manager said the package is final, but the letter gives me time to review. This is my first time dealing with any of this. It includes health coverage for a couple of months. Did anyone negotiate and succeed?

Read the release carefully. Mine included things I did not expect, like a non-compete.

Ask for the offer in writing and do not sign on the spot. A day or two to think is normal.