BREAKING: FEC Complaint FILED Against Google, Facebook, and Twitter For Election Interference
https://bigleaguepolitics.com/breaking-fec-complaint-filed-against-google-facebook-and-twitter-for-election-interference/
https://www.alipac.us/f8/alipac-complaint-fec-regarding-silicon-valley-elections-influence-365778/
Federal Election Commission
While this may not be the filing itself, the complaint is listed here, along with a list of concerns expressed by conservative media:
https://www.alipac.us/f8/alipac-complaint-fec-regarding-silicon-valley-elections-influence-365778/
https://www.alipac.us/f8/list-conservatives-censored-silicon-valley-companies-facebook-google-twitter-363125/