Question: how to legally change your surname after marriage?
Answer: Social Security: www.ssa.gov or 1-800-772-1213.
Immigration Services: www.uscis.gov or 206-553-5956.
Passport Office: www.travel.state.gov or 1-877-487-2778.
State Driver's License or Identification Card: www.dol.wa.gov/driverslicense or 360-902-3900.
Voter registration: www.votewa.gov.
Your employer.
Your bank.