After you file

return of excess contribution:

before tax due date including extension: positive earnings allocable to the excess are taxable on the Line 4b for the year of the contribution. negative earnings are ignored; in which case, for purposes of basis, consider the original requested amount as returned.

 

You must work with the custodian, by filing the right form.

 

To do this now, 
you must have a) filed by tax day, or b) requested an extension of time to file by tax day.

Do you meet these conditions?

 

@Ozce