There are 2 ways of saying you in the plural (as in the singular)
If the people you are speaking to are friends or family, or young people, the form is "vosotros" - (this is the plural of "tú") which has its own verb form: vosotros habláis - -you speak, vosotros tenéis - you have, etc.
Speaking to strangers or to someone you are on formal terms with, it is "ustedes" (the plural of usted), which takes the same verb form as "they": ustedes hablan - you speak; ustedes tienen - you have.
Ustedes is usually abbreviated to Uds or Vds in writing.
"Vosotros" is very common in Spain, and has a feminine form "vosotras"; however, it is never used in Latin America, where they say "ustedes" to everyone, even though they might say "tú" individually to the people they are speaking to.