Yes. There is a myth that absentee ballots only get counted if the election is close, however, this is not true. Under Iowa law, every ballot must be counted.

Yes. While it is recommended that you update your information prior to Election Day to speed things up at the polls, you may wait and do so on Election Day. If you are updating your address just make sure you are going to the polling place for your new address. When updating your address you will now need to provide proof of identity and proof of residency.