Best Gift

I had to look for her age here. I really don't know what 14 year old girls like, but could suggest a special treat like a restaurant, movie, smartphone, iPad, clothes, jewelry, cosmetics, book, etc.

How old is your daughter. If she is small then go for some cloths, toys, etc. Else books are also good.

Anything you can give to her, important is it coming from you, what is her favorite

It depends, how old is she? And what does she like?

Hi, does she have a hobby, maybe you can buy her something about her hobby or what does she like.

The greatest gift you can give to your daughter is your warm presence in her birthday, a tightest hug with matching sweet greetings and of course, your motherly love and care. When it comes to physical gifts, I think you might want to write a love letter for her that for surely stay in her hearts forever. This is just my thoughts but you are free to buy some most ordinary stuffs yet show deepest meaning about her or anything that could give her joy. :)

How old is she?

Collect all her photos from her infancy to right now at this moment and make a frame of it. This will be her lovely memorable moments throughout her life. I think this the best birthday gift.