More on the Military and Overseas Voter Empowerment Act here:
https://www.overseasvotefoundation.org/node/282 Has anyone done this yet -- with major election coming up before too long.
The MOVE Act says you have to register for every election cycle. Based on
this link, an election cycle is defined as the two year period before a general federal election. They use 2010 as an example, and say the election cycle for the 2010 elections consisted of 2009 and 2010. Assuming that's right, the 2012 election cycle would consist of 2011 and 2012, so if you register this year or next year (with enough time to allow them to get you a ballot), you should be ok.
Wondering how voting in local/state elections might have some impact on state income tax?
Don't know. Happily, I'm registered in Texas, which doesn't have a state tax.