Author information: (1)Dr. von Hauner Childrens' Hospital, Ludwig Maximilians University, Munich, Germany. Pulmonary surfactant is a complex and highly surface active material composed of lipids and proteins which is found in the fluid lining the alveolar surface of the lungs.
You must meet several criteria to qualify for the child and dependent care credit. To qualify, you must meet all of the following: 1  You (and your spouse, if you are married filing jointly) must have earned income for the tax year.  You must be the custodial parent or main caretaker of the child or dependent.
The Basics of the Child Tax Credit. You can claim the child tax credit for each of your children under the age of 17. Some other rules apply as well, so all your dependents may not necessarily qualify. Qualifying for and claiming the child tax credit can reduce any tax you owe to zero.