If your child is eligible for an SSN, do not file your tax return until you receive the SSN, even if this means you must file after April 15. If you file without the SSN, some tax benefits for your dependent will be denied, and they will not be paid even if you file an amended return after getting the SSN.
You must file your return with the SSN and on time; this means file before April 15, or get the automatic extension and then file before October 15. If you file without the SSN, or you are late (you file after April 15 and don't have an extension) you won't get the tax benefits and credits.
