I just received form 1065, but I've already filed my taxes. How do I file this now?

[ThomasM125]

You need to prepare an amended return to include the Schedule K-1 that is in with your partnership return Form 1065. If your tax changes, then you should submit the amended return only after the return you filed is processed and you have your refund if applicable. If your tax does not change, then you may not need to submit the amended return depending on what is listed on the K-1 schedule.