Im not familiar with GA at all, and my state doesnt give any deductions for 529 plans,so I dont see it very often.

Is it limited per spouse that contributed?  I saw this on a TaxSlayer page

https://support.taxslayerpro.com/hc/en-us/articles/4405465099034-Desktop-Where-Do-I-Enter-Contributi...

Note: If the contribution amount was more than the deductible limit, do not enter more than $4,000 ($8,000 if both taxpayer and spouse contributed) per beneficiary.