I resolved the issue myself. Turns out my daughter can claim her daughter as a dependent. I thought because she was 18 in 2025 she couldn't claim her as a dependent. But because she turned 18 in July it means for half of the year she was 17 so still qualified as a dependent. As soon as I added her back in as a dependent, I got the same results as the CRA with her qualifying for the Canada workers benefit. Turbo tax should be more clear about this in their help files. So should the CRA on their site. Their explanations are almost ambiguous. Why couldn't they state that if your daughter is born in 2007, in 2025 she qualifies as a dependent. Straight forward and no ambiguity.
