The Indiana Department of Revenue (DOR) will launch the third phase (Rollout 3) of its multi-year tax system modernization initiative, Project NextDOR, on Tuesday, Sept. 7, 2021. As DOR continues its transition to the new Indiana Tax System (ITS), there will be some outages for maintenance.
As a result, return
submission acknowledgements will not be generated from 11:59 p.m. EST on Aug.
12, 2021, until 8 a.m. EST on Sept. 7, 2021. Tax return
submissions received during this period will be processed when DOR’s system is
back online.
