Taxes 2 Questions

i am back to work 2 days a week after "retiring" 4 times. i "check" the the box that takes the most out. i also have extra taken out of my pension and approx 10% taken out of my ss check. same with the wife. we get a lot back and even got a nasty gram from the irs that we need to "lighten" up on the deductions so we don't get so much refund.
H&r block recommended 10% as well.