Political candidates and groups are required to publicly disclose their spending to the FEC, and they must explain the purpose of any specific expenditure more than $200. The FEC concluded that the Clinton campaign and DNC misreported the money that funded the dossier, masking it as “legal services” and “legal and compliance consulting” instead of opposition research.
https://www.cnn.com/2022/03/30/politics/clinton-dnc-steele-dossier-fusion-gps/index.html
They fined Hillary $8,000 for far worse.