For example, if you wish to calculate a monthly average number of hours worked and use six months of data, divide the total hours your employee works in six months and divide the result by six to determine the monthly average hours of work for the employee.
Social Security disability payments may be includable in taxable income and still not increase the tax you pay. A lump-sum retroactive payment of Social Security Disability Insurance (SSDI) may be includable in taxable income, depending on the amount and your other income and deductions.
Government disability insurance. All, part, or none of the disability benefits you receive through government disability insurance programs may be taxable. Social Security benefits: If the only income you had during the year was Social Security disability income, your benefit usually isn't taxable.