How do i add my dependant (wich is my 30 yr old daughter)w2 info

Her income doesn't go on your return.   It would go on her own return if she needed to file one.

You do not put your dependent's W-2 information on your return.

If your unmarried dependent's W-2 earnings exceed his/her standard deduction ($12,000 in 2018), they should file their own return and report the W-2 on their return.

But even if your dependent didn't earn enough to be required to file, s/he may want to file a return to recover any withholdings.