Beneficiary Enrollment Notification and Eligibility Simplification Act of 2020 or the BENES Act of 2020 This bill modifies requirements relating to Medicare enrollment, coverage of immunosuppressive drugs for kidney transplant recipients, secondary payer reporting, and hospice survey requirements. Among other provisions, the bill generally requires Medicare coverage to begin on the first day of the month following enrollment for individuals who enroll in the latter months of their initial enrollment period; requires Social Security account statements for individuals attaining ages 63 to 65 to include information about Medicare eligibility, late enrollment penalties, and other information; indefinitely extends Medicare coverage of immunosuppressive drugs for kidney transplant recipients for individuals who do not have other coverage; requires the Centers for Medicare & Medicaid Services to share Medicare Advantage and Medicare prescription drug benefit enrollment information with liability insurers in response to Medicare secondary payer inquiries; and establishes survey requirements for, and enforcement mechanisms against, certified hospice programs under Medicare.