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Appendices To help you complete your tax return, use the following appendices that in- clude worksheets and tables. 1. Appendix A—Summary Record of Traditional IRA(s) for 2018. 2. Appendix B—Worksheets you use if you receive social security benefits and are subject to the IRA deduction phaseout rules. A fil- led-in example is included. a. Worksheet 1, Computation of Modified AGI. b. Worksheet 2, Computation of Traditional IRA Deduction for 2018. c. Worksheet 3, Computation of Taxable Social Security Bene- fits. d. Comprehensive Example and completed worksheets. Publication 590-A (2018) Page 51