<prompt> Translate the following text to EnglishMabadiliko haya yanawasilisha changamoto kubwa za usimamizi na itahitaji muda mwingi ili kufanikiwa kuzitekeleza, na wasimamizi wa IRS na wafanyikazi bado wanajifunza jinsi ya kufanya kazi kwa ufanisi katika mazingira mapya.  <response>: These changes present major management challenges and will require considerable time to successfully implement them, and IRS managers and employees are still learning how to work effectively in the new environment. 