Per IRS Instructions for Form 1065, page 2:

Purpose of Form

Form 1065 is an information return used to report the income, gains, losses, deductions, credits, and other information from the operation of a partnership. A partnership doesn't pay tax on its income but passes through any profits or losses to its partners. Partners must include partnership items on their tax or information returns.

Note that any link in the information above is updated each year automatically and will take you to the most recent version of the webpage or document at the time it is accessed.