Desktop Version Progress Update

Today We have completed all sub pages of the above for desktop version
exept slider section for project as reference site
We will complete slider tomorrow along with responsive version of pages
Correct above sentence

Here’s the corrected version of your sentence:

"Today, we have completed all the subpages for the desktop version, except for the slider section, which is based on the reference site. We will complete the slider tomorrow along with the responsive versions of the pages."