Unfortunately, you will not be able to include your newborn daughter on your Tax Return until you receive her social security number.
You have two options in this situation:
1) You can file now, without her as a Dependent, and then Amend your Tax Return after you have her social security number. If you choose this option, you can click here for instructions on Amending your tax return: How to Change a Tax Return You Already Filed.
2) You can wait to file until you receive her social security number.
