"The customer is requesting the brand name & model no. for the test machine and also the testing standard from our company. Please fill out these informations in the attached report to me forward to customer."
I would not use abbreviations or symbols in this type of communication. The ampersand is clearly understood, but why use it? The "no." might not be so easily understood; however, using number is indisputable.
Information is a collective noun; it has no plural. So say, then, "Please fill out this information...."
"in the attached report to me forward to customer" is not clear. First, I'm not even sure if you are using report as a noun or an imperative verb. Do you mean, "fill out this information in/on the attached, report to me, forward to customer?" or "fill out this information in/on the attached report, [pass it by me for my approval] and then forward to customer?
Please clarify what you are asking the reader to do.
Student or Learner