Amending my return

I filed my tax return for last year and shortly after doing so, I received a 1099-R for transferring my 401k into a Rollover IRA. The 1099-R has a gross distribution amount listed and a taxable amount of $0 (also, box 7 is G). I attempted to amend my return and was told nothing changed and, therefore, an amendment is not needed. My question is do I need to amend my return, and if so where are these numbers supposed to go on the 1040-X?

Thank you for your help!