Checklist and PHP Version

But I need to perform some work before that like
1-I need to create checklist for all issues that we’ve faced after upgrade.
2- I need to also discuss with Rajeev availability because they need to change php version.
Correct above sentence

Here’s the corrected version of your sentence:

1. I need to create a checklist of all the issues we faced after the upgrade.
2. I also need to discuss Rajeev's availability, as they need to change the PHP version.

But I need to perform some work before that like
Correct above sentence

But I need to complete some tasks before that, such as: