Overcontribution to Roth 401K

I'm getting some conflicting information on how to fix my overcontribution.  For 2019, I contributed only to a Roth 401K.  Due to an employment change, I ended up overcontributing by $102.45 for the year into Fidelity.  Fidelity had me send an ROE form requesting the amount get returned.  Since this is a Roth 401K, am I supposed to wait for a new W2?  I was under the impression that since it was a Roth, I wouldnt need a new W2.  Should I expect additional forms or modified forms before filing for return for 2019?  Do I claim the returned interest in 2019 tax return or wait for 2020 return?  Thanks!