"The IRS's response provides some reassurance for employers who rehire employees by the end of 2020 that they will decrease their risk of incurring a partial termination. However, employers should be aware that rehiring employees in 2020 will not preclude a future IRS determination of a partial termination. The IRS does not address the possibility that the applicable period may extend past 2020, particularly if the employer has a series of COVID-19 terminations of employment, which would affect the calculation of the turnover rate."