There is a thread about using cheats to change a sim's name, and it also works for changing life stages too (aging up or down). Follow the instruction in the first post and you will be able to edit your sim in CAS to age them up. I'm merging this with that thread.
DEFINITION of 'Retention Bonus'. A payment or reward outside of an employee's regular salary that is offered as an incentive to keep a key employee on the job during a particularly crucial business cycle, like a merger or acquisition, or during a crucial production period.REAKING DOWN 'Retention Bonus'. With the corporate landscape changing almost daily and a liquid labor market allowing workers to move from job to job more easily, retention bonuses have provided a great way for companies to keep valuable employees.
A withholding tax, also called a retention tax, is an income tax to be paid to the government by the payer of the income rather than by the recipient of the income. The tax is thus withheld or deducted from the income paid to the recipient. In most jurisdictions, withholding tax applies to employment income. Many jurisdictions also require withholding tax on payments of interest or dividends.