If you leave off the IRS one, I run into little issues all the time. I tend to take the time to fill out the form on principal.

I recently switched car insurance carriers. My old carrier required a phone call to my agent, which I made, but then they never stopped billing me. It took more phone calls to sort it out, I was right in the end. I ended up with a check rather than a bill.

Maybe I'm old and jaded, no corporation is going to take advantage of me without a fight.