If you received a 1099C for Cancellation of Debt, that will be reported as income and you will pay tax on the amount of canceled debt.
If you did not receive one or both of the stimulus payments, you will include the Recovery Rebate Credit on your return to get the missing stimulus.
Everything calculates together. Your total income will be determined by your amount of unemployment plus the cancellation of debt. Tax will be calculated on that income. The taxes you had withheld from your unemployment will be applied to your total tax.
Any rebate recovery amount will either be applied to the remaining amount of tax due or refunded. Each situation is unique.
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