Modernized e-File Schemas and Business Rules for Individual Tax Returns and Extensions Tue, Apr 11, 2023 1040Online, Desktop Program, Hosted Program The tables below provide links to the Tax Year Specific Release Memorandum, XML Schemas, and Business Rules for the Modernized e-File (MeF) 1040 Series and Extensions TaxYear 2022 IRS Link: https://www.irs.gov/e-file-providers/tax-year-2022-modernized-e-file-schemas-and-business-rules-for-individual-tax-returns-and-extensions TaxYear 2021 IRS Link: https://www.irs.gov/e-file-providers/tax-year-2021-modernized-e-file-schemas-and-business-rules-for-individual-tax-returns-and-extensions TaxYear 2020 IRS Link: https://www.irs.gov/e-file-providers/tax-year-2020-modernized-e-file-schemas-and-business-rules-for-individual-tax-returns-and-extensions