IHS for child

Dear Gurus
While I applied online for my wife and daughter and paid fee and booked appointment for biometrics and passports submission.
But at the end I would aid application fee for both and IHS for my wife but in my 8 year old daughter case there was showing 0.00 so could not pay IHS for daughter only paid application fee.
Although received IHS reference number for both
What should I do?
I am wondering if don't pay daughter's IHS before biometrics date would they turn down them.
And if so when and how can I pay?
Thanks

Please advise
Thanks

IHS is payable for child. UKVI will likely ask you to pay it once your application is submitted.

Thanks CR001
Your support always very helpful
So you mean here home office will ask after submitting passports and biometrics not after making online application?
One more question who should sign my 8 year old daughter' s passport?Her mother I believe or just should leave that part empty?

Most members have reported getting an email to pay the IHS for the children.

Not sure what you mean by 'sign passport'.

I mean Pakistani passport on page 2 it says
Must singed my passport holder otherwise not valid
But who should sing child's passport in that box?

Suggest find out form the Pakistan authorities or sign it as the parent.

Thanks CR001
Pakistani authorities say leave this box blank but I don't think its correct.
Anyone who has experience please share.