I have a report created in Latex:

\documentclass{report}
\usepackage[backend=bibtex]{biblatex}

• If I'm not mistaken, \printbibliography[heading=bibintoc]. But are you using bibtex as you state in the title and the tag, or biblatex as it appears in the MWE? – Phelype Oleinik Nov 8 '18 at 22:26
• @PhelypeOleinik, Your solution works. I compile the .aux file with bibtex. I use the [] in \usepackage[]{biblatex} to specify how bibliography should be sorted and cited. – Viesturs Nov 8 '18 at 22:32
• Ooh, I'm sorry. I didn't see the backend=bibtex` there. You are correct. If it worked, then your question is a duplicate of: Bibliography not in ToC when using biblatex/biber. – Phelype Oleinik Nov 8 '18 at 22:34