Inquiry about the correctness of the outputs

I don’t know if I know if the developer portal control is correct or incorrect. I work in the PHP programming language. There are two images, one for a simplified tax invoice and one for a completed tax invoice.



I see red marks on others, but next to it is null

Dear,

To provide a compressive support can you kindly elaborate more regarding your concern.

Thanks

Inquiry: Am I on the right track? Are my steps correct so far or am I missing something? Through the pictures I attached