I made 5550$ contribution at fidelity and transferred it to vanguard in 2018.
In early 2019, i forgot about this transfer and contributed another 5550$ to vanguard Traditional IRA-- hence it is an excess 5500 contribution.
I did not deduct any IRA contributions since 2016 due to high income. I have been reporting these non-deductible IRA contributions on form 8606.
