You need the resort confirmation number to access 180 + 10 booking, which your member can send you. You will need to make reservations online or via WDW-DINE. Only members can make restaurant reservations through DVC Member Services.
If you are within 180 days of your full trip, you do not need any resort confirmation number to make restaurant reservations (unless you want to be exempt from prepayment for CRT or a dinner show because you intend to use dining credits to pay for them).