T 2200 Different %

I am trying to enter in my work-from -home expenses and have a T2200 from my employer. My heat/water will be at 20% as my office is 1/5 of the house however my internet is at 100% because this is a requirement for my work. We have separate internet for personal use.

When I enter in my amount on Turbo Tax, it takes everything at 20%, including my internet. I am not wanting to upgrade to the Self Employed version just for this as I am not self employed. 

Any ideas?