If you wish to apply for equal status with Danish citizens on the basis of having moved to Denmark together with your parents, you must have moved to the country before your 20th birthday. It is a condition that the family continues to reside in Denmark and that you and your parents have permanent residence in Denmark.
This is what we do
When we investigate whether you and your parents have permanent residence in Denmark, we use the information about you and your parents contained in the national register. If you think that the information in the national register is inadequate or incorrect, you must approach the national register in the municipality you live in.