Mike is a single taxpayer. For the payroll period of November 2021, he is paid wages of $2,400, monthly. Mike checked the single box on his 2021 Form W-4 and provided no additional income or deductions. a. Use the percentage method to calculate the amount of Mike's withholding for a monthly pay period. b. Use the withholding tables to determine the amount of Mike's withholding for the same period.

Payors are required to use backup withholding if: a. The taxpayer did not give the payor his or her taxpayer identification number. b. The taxpayer fails to certify that he or she is not subject to backup withholding. c. The IRS informs the payor that the taxpayer gave an incorrect identification number. d. The IRS informs the payor to start withholding because the taxpayer has not reported the income on his or her tax return. e. All of these will require the use of backup withholding

Yaxin is self-employed for 2021. Yaxin estimates her required annual estimated tax payment for 2021 to be $4,000. Yaxin had a $500 overpayment of last year's taxes which she will apply against her first quarter estimated payment. a. How much should Yaxin pay with her first quarter estimated tax voucher? b. When is the payment due?