If you are an Alaska resident service member stationed outside Alaska, your Alaska driver license and your spouse’s stay valid until 90 days after your discharge, or until you return to Alaska, whichever comes first. You can print a Military Expiration Endorsement to carry as proof the license is still valid.
There is nothing to file with the DMV. Print the Military Expiration Endorsement and carry it with your expired license.
Your Alaska driver license, the printed Military Expiration Endorsement, and your orders showing you are stationed outside Alaska.