Determine current MM periods?

The standard SA开发者_运维问答P MM advice is that only two periods can be open simultaneously.

How to determine them from within the program (FM to call/table to read)?

This information is stored in table MARV.

(Answer found on SDN).

1.Go to T code MMRV

2.Provide company code

you can find the current period , previous period and last period in previous year