Recently, the bank launched a dedicated website for the pensioners called the SBI Pension Seva. This is a website where pensioners of SBI can login and check their pension related details instantly.
Here is the link to the website: https://www.pensionseva.sbi/WebPages/Login/PensionerRegistration.aspx
Note that there are at least four modes of submission of pensioners life certificate- Manual submission, Digital submission at SBI branch, online through the UMANG app, or generate life certificate by visiting Citizen Service Centres (CSC) or Aadhaar Seva Kendra spread in different parts of the country.
So far the deadline for the submission has always been 30th November, but this year in view of the Coronavirus pandemic, the Centre has decided to give the pensioners an extra window to present their Jeevan Pramaan Patra.