"He has told it to me" is volgens mij correct.
Volgens mij ook.
Wat is er mis met: he told me so
Het moet waarschijnlijk zijn: he HAS told me so.
He has told me is goed gekeurd. Zonder 'it'
He has told it me.
Zou ook goed wezen?
"He has told me" and "He told me" have the same meaning. "He told me" is much more natural for a native English speaker like me.