Low income Iowa residents would get a bigger break on their taxes under a bill that is moving through the state Senate. Officials say the measure would apply to households with incomes of less than $45,000. About 210,000 households would get a roughly $250 tax break. The proposal would raise the state credit from 7 percent to 20 percent of a taxpayer's federal earned income tax credit. The Senate Ways and Means Committee approved the bill Tuesday and will now go to the full Senate for a vote.