ROTH 401k excess contribution

Over contributed to ROTH 401k last year by around $1,000 but the excess was taken out before 4/15.  On my 1099R, it's showed a TAXABLE AMOUNT (box 2a) of around 50% of that with distribution code (box 7) of B8.    some ppl advised me that this needs to be reported as OTHER EARNED INCOME, is that correct?

thanks for the guidance