What is the most annoying paperwork you ever had to do ?

Paperwork associated with a task I was given to at work. It was just so tedious that I thought it was going to kill me, but it had to be done. What made it worse is that I was cleaning up someone else's mess because they didn't get right the first time around. I imagine they didn't do it right because it was just really tedious.

accounting paperwork, it's a lot of stuff and complicated, and frustrating

Sometimes I fill in Superannuation forms... or other forms. It does get a bit dull.

claiming Money for the Team every time I sent them on a Visit the RAAF travel and subsidy allowance