Question: On April 15, 2021, Malcolm requested an extension of time to file his 2020 income tax return. He completed his return the evening of Sunday, October 11, 2021, determining that he owes $1,000. He put the return and a check to pay the tax in the mailbox on Monday, October 12, 2021. The IRS received the return on Friday, October 16, 2021. What is the filing date of Malcolm's 2020 return? Select one: a. April 15, 2021 b. October 11, 2021 c. October 12, 2021 d. October 15, 2021 e. October 16, 2021