You can report on SYDEREP from February 1st to March 31st 2017. As in previous years you are able to save your input and complete your report at any time. Even after transmission you will be free to make any change and send it again until March 31st 2017.
However we draw your attention to the importance not to wait until March to carry out your report, since it is of your responsibility to achieve a correct declaration.
Indeed, should SYDEREP platform crack because of too many connections, preventing you from declaring on time, ADEME will not be held responsible.