I submitted my taxes and owe money. I setup a payment plan on the IRS site. Being unemployed, with the $10,200 untaxed, what should I do?

If you filed your tax return before the $10,200 exclusion for unemployment income took affect, you should continue your payment plan so that it doesn't get cancelled for non-payment. Once you get your refund for the tax on your unemployment income, any overpayment on your payment plan will be refunded to you.