MS GP - How to post to a recent closed year?

1. Open (uncheck) a fiscal period.
Tools -> Setup -> Company -> Fiscal Periods

2. Check Allow Posting to History.
Tools -> Setup -> Financial -> General Ledger

3. Post a transaction. In a posting journal the entry will appear twice since it’s updating last year’s balances and this year’s beginning balances.

4. Close (check) a fiscal period.
Tools -> Setup -> Financial -> General Ledger

5. Uncheck Allow Posting to History
Tools -> Setup -> Company -> Fiscal Periods