This is the current unified reporting form. You specifically need Section 2 , which covers insurance contributions for industrial accidents and occupational diseases (the old 4-FSS).
The most reliable source for the latest templates and filling instructions is the official Social Fund of Russia website (sfr.gov.ru). skachat blank otcheta dlia fss
If you have 10 or fewer employees, you may still file on paper, generally by the same deadline (the 25th). Content to Look For This is the current unified reporting form