I apologize for this delayed reply to your gardening question and hope it is still helpful to you.
I would start with watering and rolling the turf. Don't overwater or you'll just make a mess. If this doesn't work I would then try shoveling small amounts (about 1/2") of soil over the sod in the low areas. Turn a soil rake upside down and use it like a shuffleboard stick to spread the soil smoothly over the low areas. If this is still not enough to make it level then add more soil in a few months after it has had a chance to grow in well.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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