If you submit single enter the unique entry is not a based based as the child of the children of Young Lan at Penang, you must have a valid certificate?
Gotable one unique at TP HCM? I know they for the same status with people Thái. Sorry to TP HCM more Penang
Then I can extend 1 year in Thailand

I have all required paper required

 

I am having problems understanding your post.

You must have a birth certificate to a apply a single entry non-o visa based upon being the parent of a Thai anywhere you apply.

To apply for a one year extension of stay at immigration you must be the legal father of you child by way of marriage or legitimization of your parenthood.