for your 1099, you'll have to amend if your return is accepted. you can not amend until the original return is fully processed - you get your refund or the IRS clears the payment.
the 1099 goes on schedule C with job related expenses. you will owe self employment taxes if the net is more than $400 but you probably will get the QBI deduction
under certain conditions you may be able to deduct health insurance premiums paid, even Marketplace Insurance, on page 1 of your return rather than as a schedule A deduction
if you have a state return that also needs to be amended also
you can not efile them. they must be mailed.
the 1040-x which you need to amend is not yet available.
when you open TT click on the amend my return icon
