Conquering Political Conspiracy Theory Addiction, page-11

Hi flatspin, that one was real. But collusion is not a crime. You can't be charged with it. It must be conspiracy.

On March 22, 2019, the Special Counsel submitted their report to Attorney General William Barr. The investigation garnered 199 criminal charges, 37 indictments or guilty pleas, and 5 prison sentences. Attorney General Barr declined to follow up on dozens more obstruction charges, particularly with regard to destruction of evidence.

Just to give one specific instance of collusion from Wikipedia (so you get the sources):
Mueller investigated the meeting on June 9, 2016, in Trump Tower in New York City between three senior members of Trump's presidential campaign—Kushner, Manafort, and Donald Trump Jr.—and at least five other people, including Russian lawyer Natalia Veselnitskaya, Rinat Akhmetshin, a lobbyist and former Soviet army officer who met senior Trump campaign aides, Ike Kaveladze, British publicist Rob Goldstone, and translator Anatoli Samochornov.^[206][207] Goldstone had suggested the meeting to Trump Jr., and it was arranged in a series of emails later made public. In one email exchange of June 3, 2016, Goldstone wrote Trump Jr. that Aras Agalarov "offered to provide the Trump campaign with some official documents and information that would incriminate Hillary and her dealings with Russia and would be very useful to your father", adding that it was "very high level and sensitive information but is part of Russia and its government's support for Mr. Trump" that he could send to Donald Trump's assistant Rhona Graff. Trump Jr. responded minutes later "Thanks Rob I appreciate that" and "if it's what you say I love it."
https://en.wikipedia.org/wiki/Special_Counsel_investigation_(2017%E2%80%932019)#Alleged_collusion_between_Trump_campaign_and_Russian_agents