This year I opened a custodial account with Capital one because they offered to add $100 if I did. I did screw up, you had to set up an automatic deposit AND buy a fund. I forgot to delete the automatic deposit so I have $198 in the fund (100-4 from my deposit and $100 from them, plus the gains) and $200 in cash. I assume I have to do a tax return for my daughter because of the $100. Is that correct? And does that mean I have to file again every year until I close it out, even if she made nothing?