(Salem, OR) -- Low- to moderate-income families could be missing out on money if they don't file their income tax returns. The Oregon Department of Revenue is urging families to file. They could be eligible for thousands of dollars from the federal Child Tax Credit, the federal Earned Income Tax Credit, the Oregon earned income credit and the Working Family Household and Dependent Care Credit. The Oregon Department of Revenue's website has information on options to file a return for free.