It would depend on the state you worked in and the nature of your "incentive to retire".
An incentive offered by Citadel Insurance Company is that Citadel will tailor an insurance based wealth accumulation structure for an affluent client. This incentive will enhance tax efficacy and asset protection.
As an incentive to pay obligations early buyers are offered discounts by seller
The boss offered a cash bonus as an incentive for hard work
I'm not an attorney, but from the sounds of your question, the "package offered by your company" appears to be in lieu of unemployment benefits (chargeable to the company), in return for some type of remuneration payable to you. They could also be downsizing, etc. and to be fair to you, allow you to file, unchallenged, for unemployment. It would seem prudent to check with the unemployment office in regard to the agreement you have, to determine where you stand.
a test question
An incentive moment is a moment in time when something worth a task needing to be done is presented. For example, an incentive moment might be a moment when someone is offered a snack in order to do a chore.
A corporate incentive is an incentive that corporations provide to employees or potential customers. Salesmen often try to reach quotas on the sales of products so that can be eligible for any corporate incentives offered.
Companies would have corporate incentive programs in order to make their staff perform better. An incentive offered for good work could be cash or a gift or even a free holiday.
Bread lines offered free food to struggling families during the Great Depression. This was a time of high unemployment.
There are thousands of products offered by the eBay company. There are computers, cars, household items, etc.
something that incites or tends to incite to action or greater effort, as a reward offered for increased productivity. or a reason to do somthing
No (he or she) does not. The employer doesn't have to pay any of it at all. If it is offered, it is an incentive to attract the best employees.