After we have already defined fiscal year variant and assign it to our company code, it is time to define Posting period variant. Posting period variant is used to control which accounting period is open for posting. This is an important control tool for every organization which has monthly closing. Usually every posting period is assigned to one company code, but you could assign one posting variant to many company codes. In this way you will control all the entities in once which has pros and cons.
Despite the strict dates you agree with other departments in your organization there will always be a cases where for some operation, period should be open. So you should very carefully consider whether you are going to define one posting period for several company codes or you will have one for each.
IMG Path: Financial Accounting (New) -> Financial Accounting Basic Settings (New) -> Ledgers -> Fiscal Year and Posting Periods -> Posting Periods -> Define Variants for Open Posting Periods
When you open the transaction you should hit “New Entries”.
After the new entries fill the necessary fields. In this case the variant will be with the same identification as my company code.
Save it and next task will be to assign this variant to the company code.