The president Bolsonaro announced the end of DST to 2019/2020 in his twitter account:

This is the twitter of ministry of mines and energy where more details will be post:



Em sex, 5 de abr de 2019 às 18:32, Steffen Thorsen <thorsen@timeanddate.com> escreveu:
According to multiple sources the Brazilian president wants to get rid
of DST.

https://gmconline.com.br/noticias/politica/bolsonaro-horario-de-verao-deve-acabar-este-ano

https://g1.globo.com/economia/noticia/2019/04/05/governo-anuncia-fim-do-horario-de-verao.ghtml

https://republicadecuritiba.net/2019/04/05/bolsonaro-afirma-que-brasil-nao-tera-horario-de-verao-em-2019/

There might be some formalities still, but given these articles it seems
very likely that they actually will stop changing clocks.

Best regards,
Steffen Thorsen - timeanddate.com