Yes sir, i understand your query regarding the last date for applying for ipu cet for software engineering as there is one official career 360 article link for full detail as  follows:

https://university.careers360.com/articles/ip-university-application-form

https://engineering.careers360.com/articles/ipu-cet

The application proced had already been started on march 22,2019 and the last dau for fee payment was on july 12,2019

I hope that all the detail will get you in the official article of career 360 as it has  full description of ipu cet 2019

Still you have any query ask me in comments

Good luck!!