1. Make sure your daughter meet all criteria to be claimed as a dependent.
Who can I claim as my dependent?
2. If someone else claimed your dependent inappropriately, and if they file first, your return will be rejected if e-filed.
You would then need to file a return on paper, claiming the dependent appropriately. The IRS will process your return and send you your refund, in the reasonable time. Shortly (up to a year) after that, you'll receive a letter from the IRS, stating that your dependent was claimed on another return. It will tell you that if you made a mistake to file an amended return and if you didn't make a mistake, do nothing. The other party will get the same letter you did. If one of you doesn't file an amended return, unclaiming the child, the next letter, from the IRS, will require you to provide proof. Be sure to reply on time.
If you entitled to claim a dependent you would get the tax benefits; not entitled filer gets to pay the IRS back with penalties and interest.”
