Impact & Corrections Process in case Month End Activities are not done.

Hi

What are the impacts & how to correct in case the business has not closed the month-end activities at a regular interval?

Scenarios:-

Feb 2020 - Correctly Closed along with Actual Costing

Mar 2020 - Normal Closure w/o Actual costing (Not yet done)

April 2020 - Normal Closure with Actual Costing ( Not yet done)

May 2020 - Normal Closure with Actual Costing ( Not yet done)

Does anyone experienced the above scenarios in their current project & can share the observations.