Question

what is the in-text citation for a quote from a company homepage

Answer 1

In parenthesis, company name (unless a specific author is listed), a comma and space, year of the page's copyright (unless a specific date is provided for the article), comma and space, paragraph number the quote appears in.

Example:

"If your computer is not functioning correctly, you can use these restore points to return Windows XP to a previous state when your computer was functioning correctly" (Microsoft, 2012, para. 1).

Answer 2

That is for APA format by the way.