Thank you for posting your query in this forum, it's a great place to find answers.
I reviewed your post and I understand that you want to know how to insert the SKU in bios.
Don’t worry, we will work together to resolve this issue and It’s a pleasure to assist you in this regard.
I would like to inform you that you cannot insert the SKU numbers in bios and this needs to be done at the HP service center. I recommend you to contact phone support to check the available service options for your computer.
Here is how you can get in touch with the phone support.