How do I claim my internet bill as a business expense in QuickBooks Online?

I use my home wifi for both personal and business use. How do I go about entering this in my books?

A couple of things I’m looking for l clarity on:

1. Can I categorize the entire transaction of a monthly bill as a business expense (as opposed to having to “split” the transaction in my books)? Then, come tax time, I’d write it off with my home office deduction, which would effectively calculate the business-use percentage.

2. Or, do my books need to reflect the business usage vs. personal usage from the get-go?

3. Also, what’s the difference between reporting internet bill on schedule C or with home office deduction?