Disclaimer: I do not own Naruto
Being a dad means applying for a Social Security number when filing out your baby's birth certificate. It's quick and easy – and you'll need it to claim her as a deduction
Gaara did not like forms. Perhaps it came with being a kage of a village. Even if at the beginning you are gung ho about paperwork it eventually becomes too much and all you want to is burn it to the ground. Or throw outside to the sand if one did not have an Uchiha present.
No one told him that when babies are born, forms need to be filled out! He thought it was just give your signature on the birth certificate and bang- you have your baby. Apparently, there was this little thing called Social Security. Gaara didn't know much about to tell the truth, he knew it involved money and that Kankuro would figure out a way to work it in his favor. Gaara had prepared himself for the worst. Too many sheets of paper and all of them asking for basically the same thing.
In reality, the form was simple and it gave him a new deduction; he still made his assistant do it though.