I received a lump sum for social security disability on an appealed SSDI claim in April 2021. The backpay covered 5 months in 2019, 12 months in 2020 and 4 months of 2021. No tax was taken from the lump sum.
What are my options for filing this? I know I owe tax on the lump sum, but I don't want the entire sum to be claimed in 2021.