In the following MWE, the Bibliography entry in the ToC links to page 3 instead of page 5, where the Bibliography is.
If I first \printbibliography and then \addcontentsline, then the entry in the ToC links to the last page of the Bibliography (this is kind of hard to put in the MWE, but see this other question and the first response
(if I omit \cleardoublepage, then the ToC entry displays the wrong page and links to the wrong page)
\documentclass{book}
\usepackage{blindtext}
\usepackage{hyperref}
\usepackage{biblatex}
\addbibresource{library.bib}
\begin{document}
\tableofcontents
\chapter{Test}
\cite{Kullback1997}.
\blindtext
\cleardoublepage
\addcontentsline{toc}{chapter}{\bibname}
\printbibliography
\end{document}
and the .bib file:
@Book{Kullback1997,
Title = {Information Theory and Statistics},
Author = {Kullback, S.},
ISBN = {9780486696843},
Publisher = {Dover Publications},
Series = {A Wiley publication in mathematical statistics},
URL = {https://books.google.com.sa/books?id=05LwShwkhFYC},
Year = {1997},
__markedentry = {[wolfersf:6]},
Lccn = {97014382}
}