Moved to MA July 1 2020 from GA

Hi - my daughter has been employed by a company based in MA since 2019. Through June 2020 her residence was GA. In July 2020 she moved to MA (signed an appt lease with a friend). Her 2020 W-2 only shows GA. I have purchased both GA and MA State. Her 2020 income is a little over $50k. Since she moved in July, I'm thinking Jan - June should be taxed by GA and July - Dec. taxed by MA. However, GA shows a large refund (b/c I set the dates to Jan - June, and allocated half of the salary to GA and the other half to MA) but MA shows no tax due. How can that be? Also, I've read that MA allows moving expense and apartment rent deductions. The rental deduction looks tricky - can can she claim that as MA is her primary/only residence now but the first half of the year her official residence was GA?