I received $8000.00 bonus; do I need to file a separate form for s.s. when filing my taxes or can I just list ist it under additional earnigs as bouns?

How did the employer report this bonus?

I received a 1099

You will report your income and expenses on schedule C or C-EZ (Form 1040). This income is subject to SE tax at 15.3%. Read: Your U.S. Tax Return: Tax Filing by Self Employed Sole Proprietor or Independent Contractor