I have ITA in hand and every document ready to be submitted. The only thing holding me back is that I noticed that my mother's date is wrong in her ID documents (passport, etc). In order to get this fixed, it will take too much time (and I am not even sure if this can be fixed). I need to fill this information in the family information section. Does anyone know any solution? Please help. Thanks
Should not be a problem, I think you should go ahead to submit. Even if you plan to invite her at a later time after your application has been successful, she should have rectified the error by then, you are only submitting dependents documents now.
if you do not fix her birth day on her official document, you have to submit the dates on her passport, ID ... even though it is not correct, because at any airport, they will check that date, they won't ask you about your birthday, but your ID.