After you have started the Georgia state program you will land on a screen Here's the income that Georgia handles differently. Under Education, on Path2College Savings Plan Contributions, click on the start button.
This is the section for entering the contributions to a Georgia state 529 plan.
For taxable years beginning on or after January 1, 2016, you can deduct up to $2,000 of contributions for each beneficiary (or up to $4,000 for each beneficiary if Married Filing Jointly). Contributions made during the past year, or before the April 17, 2018 federal tax filing deadline, are eligible for the deduction.