Contributions
Also known as a deferral, this is the amount you are with-holding from each paycheck and putting into your retirement account.
Percent or Dollar Amount?
Depending on your plan you may be able to choose a deferral amount as a percent of your earnings per period, or as a dollar amount per period. You may also choose to enter amount you defer over the course of a year.
Is there a maximum I can defer?
Yes, but this amount depends on your age. These amounts are listed above the options.
Can I choose not to defer?
Yes you can, this is the last option on the list, although we don't recommend it and you could be missing out on "free money" from your employer.