Is this not sounds rude? " "H entered the check-in mileage and is now asking how to do the same for check-out."

The statement you provided isn't inherently rude, but it can come across as a bit blunt or matter-of-fact. To make it sound more polite or friendly, you might consider rephrasing it. Here are a couple of options: 1. "H entered the check-in mileage and is now looking for guidance on how to enter the check-out mileage." 2. "H has successfully entered the check-in mileage and would appreciate some help with the check-out process." By adding phrases like "looking for guidance" or "would appreciate some help," you can soften the tone and make it sound more collaborative.