Need help to print page on one A4 size paper C# asp.net css, html, java script

I am having one application [login to view URL] user : johan1 pwd johan1 there are total 6 tabs on the after login page. I need developer who can help me to fix the issue with printing ("Print bij voorkeur"). Currently the printing working fine with Print Media CSS but I need a print to be fitted on one A4 size paper. I need last 4 tabs data to be printed and fitted on A4 size. the foruth one is working fine. Let me know if any question.