To get your driver’s license, you need to show two proof of address:
The "Letter to the Tax Collector" provided by SavvyNomad
A second proof of address must be from a different organization than SavvyNomad (state requirement) from this list. Most users use printed cell phone bill, credit card statement, or bank statement. You can even use a prepaid cell phone plan. An example receipt (from US Mobile) is shown below.