The IRS is shifting 1,200 employees to work on a backlog of 2020 tax returns in an attempt to minimize delays in processing 2021 tax returns, multiple reports said. “This is an all-hands-on-deck situation to help people as quickly as possible and reduce the stress on employees who have been and continue to face unprecedented levels of inventory to be worked,” IRS Commissioner Chuck Rettig said Wednesday in an internal email to employees obtained by Politico. The 1,200 employees have previous experience processing returns and will stay in their new positions through September, an IRS spokespers…