Starting New Year’s Day, many attorneys who practice in the state’s 10 biggest counties must change one of the most basic things about lawyering.

Forget about running to the courthouse to file a document by deadline in a big case. Instead, as the Texas Supreme Court’s e-filing mandate goes in effect, all filing must happen at the click of a button, sending the document through EFileTexas.gov, the state’s new electronic-filing system. It was formerly called TexFile.