What happened after the electoral college voted in the election of 1800?

Do you mean who won? If so it was Thomas Jefferson. When the electoral votes came in, Jefferson and his running mate had won 73 votes each compared to Adams and his running mate who were met with 65 and 64 votes. Try looking through this article. It may give you something that I didn't.

https://millercenter.org/president/jefferson/campaigns-and-elections

Cwould be the answer