Income tax; providing credit for eligible dependent children; stipulating credit amount. Effective date.

SB 309 creates a state income tax credit for married couples with eligible dependent children in Oklahoma. The credit amount depends on the couple's continuous marriage duration: $500 for 1-5 years married, $1,000 for 5-10 years, $1,500 for 10-15 years, and $2,000 for 15+ years. The credit cannot reduce tax below zero, has annual limits ($10,000 for joint filers, $5,000 for separate filers), and unused portions may be carried forward for up to five years. To claim the credit, families must provide marriage license details and certify continuous marriage through the tax year.