U.S. Federal Election Commission issued the following announcement on Jan. 28.
The Year-End report is due Thursday, January 31, covering activity through December 31, 2018. Staff in the Reports Analysis Division and Electronic Filing Office will be available until 8:00 p.m. ET on January 31 to answer questions regarding the content and filing of reports. To reach RAD, call 1-800-424-9530 (press 5) or 202-694-1130. For help with technical issues relating to electronic filing, dial the same toll-free number and press 4. The E-Filing Office can also be reached locally at 202-694-1307. For additional reporting information for all types of filers, consult our dates and deadlines webpage.
Original source can be found here.