Comment by OneDeuxTriSeiGo

Okay so your random HR person at a nontechnical small to medium sized business now is on the line for developing spreadsheets to manage scheduling.

OR they need to maintain a set of activity codes and a timesheet outlining how many hours (or partial hours) each week are spent on what types of tasks.

It's unnecessary complexity if you want to be in actual compliance with the tax code vs just guessing whether XYZ task is on one side of the line vs the other and hoping it doesn't come back to bite you later.