I can only find one allegation involving a teenager (13 years old) - here's her affidavit.
JANE DOE, proceeding under a pseudonym, Plaintiff, v. DONALD J. TRUMP and JEFFREY E. EPSTEIN
https://www.politico.com/f/?id=00000158-26b6-dda3-afd8-b6fe46f40000
Various other women have publicly accused Donald Trump of sexual assault, including rape, kissing and groping without consent etc, although none of the others were teenagers at the time.
The article below details many of the allegations.
The Allegations Women Have Made Against Donald Trump
https://www.nbcnews.com/politics/2016-election/allegations-women-have-made-against-donald-trump-n665731
Altogether, a total of 25 women have made allegations of sexual misconduct against Trump.