Final answer:
When calculating taxes to be withheld using the percentage method tables for a manual payroll system, Social Security tax at 6.2% and Medicare tax at 1.45% of gross pay are included, along with federal withholding tax which requires consulting IRS tables and Form W-4 details.
Step-by-step explanation:
When calculating the taxes to be withheld for each pay period using the percentage method tables for a manual payroll system, it's important to account for federal withholding tax, Social Security tax, and Medicare tax.
The Social Security tax is 6.2% of the gross pay, and Medicare tax is 1.45%. To compute federal withholding, you should use the latest IRS tax tables and consider the employee's filing status and number of dependents.
However, to demonstrate the calculation process, we'll assume a federal withholding percentage which would need to be determined based on the employee's completed Form W-4 and the IRS tax tables.
For example, if Naila has a semi-monthly pay of $6,200, the Social Security tax would be 6.2% of $6,200, which equals $384.40, and the Medicare tax would be 1.45% of $6,200, which equals $89.90.
The total of these two is $474.30. If we assume a federal withholding of 30.5% as per the provided assumption (which in reality would be determined by looking at IRS tables and the employee's W-4), the federal tax would be $1,891.00. So, Naila's total taxes withheld for the period would be $2,365.30.
The same method should be applied to calculate taxes for Wilfred, Byron, and Annie using their respective gross pays and considering their filing status and number of dependents.
Please note these figures are for example purposes and need to be calculated based on the latest tax tables and information provided on each employee's Form W-4.