Change dots from first line to the second line (List of Tables)

This too long for a comment, which is what is more than an answer.

The standard classes (book, report, article) do what you want.

% lotprob.tex  SE 558714
documentclass{report}
begin{document}
listoftables

begin{table}
centering A TABLE
caption{This is a long caption that takes more than one line when printed in the LOT}
end{table}
end{document}

You have done something different but have not provided an MWE (from documentclass... to end{document} like the one above) exhibiting your problem that we can compile and maybe help you.