Schedule K1 (1041) dated for different year than distribution

[Filosifi]

I received money as a one-time beneficiary of an estate in January of 2023. The K1 form I was given by the estate's tax preparer is dated for 2021 however. They're telling me I need to amend my tax return for 2021, but if I do so I'm going to be assessed penalties and fees for amending it. Is this correct? 

[M-MTax]

It's correct that you have to amend your 2021 return and include the K1.....you may have to pay interest if you owe more.

[MarilynG1]

You are not assessed penalties and fees for filing an Amended return, although you may owe tax (and interest) on the additional income.

Here's more info on How to Amend a Prior Year Return.

Your Reason for Amending is 'tax form received after tax filing deadline'. 

@Filosifi