Business versus hobby

Your final, completed tax return for the year is due on
April 15. It will show your total tax liability minus the four
prepayments that you have already made. If it turns out that
you owe a small additional amount, that must be paid when
you file the return. (If for some reason you have overpaid,
you can request a refund or carry the extra amount forward
to be applied to next year’s tax liability.) As a self-employed
businessperson, you need to use the federal long form 1040
(and the state long form as well) and include the following
attachments: