How much are you short on income. You can estimate your income for 2018, and “add” some cash income on your 1040 to take you up the do the required income as long as it’s not too much. You won’t pay much in tax and you’re not subject to self employment tax until you earn $400 or more.
I would go ahead and plus up your income now…that gives you a couple of weeks to figure it out and either notify the exchange you were wrong on your estimate or find a way to get there.
