I filed via free fillable forms. I got my tax return accepted by the IRS electronically. I somehow forgot to fill out line 16 on the 1040, which is my tax that I owe. Do I need to file an amend? I think once the tax hits, I end up going from a refund to owing money like ~$100 overall. Would they do this themselves or would I need to amend? If so would I need to do so immediately?
