They will put it right and send you a new award notice.
You should keep the award notice in a safe place.
You can't get a copy of your award notice online.
You should do this within one month of getting your award notice.
You'll get another award notice after 1 September showing this.
Once you've told them about your baby they'll send you a new award notice.
You've already had an award notice - what happens next?
You'll get another award notice after 1 September which will show this.
Use the checklist you're sent with your award notice to check what the changes are.
Check your award notice to find out if you get tax credits at a reduced rate.