Change of Circumstances and Corrections in online submitted

I have submitted the online application using the online service last month, and paid the fee as well. After a week of application submission, I am blessed with a baby and my contact information has also been changed.

Now there are many changes with reference to the submitted application e.g. children, contact details, and couple of corrections as well.

Please guide/advice how to incorporated these change of circumstances or correction in already submitted (online) application. Since no change is allowed once we submit the online application and pay the required fee. Biometrics, Signed Application and Documents are pending due to this confusion.

The guidelines on www.visa4uk.fco.gov.uk says that i should make the Corrections on the printed application form, by hand-writing. I want to know the correct, official and proper method in this suituation, may i change things by hand-writing, or attach and sign an additional sheet, or fill some form, i mean what i should do to achieve this.

Note: Hard-copy of application along-with biometrics and documents is Yet to be sent to the concerned consulate/visa-center.

I would appreciate your help in this regard.

Thanks.