Yes. The Consolidated Appropriations Act, 2021, created a one-year opportunity. Use the prior year’s income if it results in a larger earned income tax credit. But don’t if it results in reducing or barring the credit.
A capital loss that is not deductible because it exceeds the annual $3,000 capital loss ceiling. A carryover loss may be deducted from capital gains of later years plus up to $3,000 of ordinary income.