Yes, two deadlines apply to the amended tax returns required for your claim. The deadline for your 2020 amended tax return is April 15, 2024. This deadline applies to the period between April 1, 2020, and March 31, 2021, and accounts for $15,110 of the SETC value. The deadline for your 2021 amended tax return is April 15, 2025. This deadline applies to the period between April 1, 2021, and September 30, 2021, and accounts for $17,110 of the SETC value.