When you withdraw your earnings from your Earn2Life account, the money is sent to an in-world Earn2Life.com ATM after a period of time determined by your current membership level.
The screenshot below demonstrates waiting periods depending on your account level. You can access this chart from your E2L Dashboard by clicking on your Account Level next to your profile picture:
You can also check this information by logging into your E2L account and clicking on the My Earnings tab in the left column, then scroll down to your Withdrawal History to see when the funds will be available. The more offers you complete and the older your account is, the faster your withdrawals are transferred to the Earn2Life.com ATM. Earn2Life.com ATMs can be found in many different locations throughout SecondLife. You can also find one at the in-world offices of E2L