Path: SAP Menu -> Accounting -> Financial Accounting -> General Ledger -> Master Records -> G/L Accounts -> Individual Processing -> Centrally
Transaction Code: FS00
Reconciliation accounts are G/L accounts.
Enter a number for the reconciliation account, and click on the "Create" button. You can also create it with a template.
In tab "Type/Description" select "Balance sheet account".
In tab control data, in the field "Recon. account for acct type", select "Customers" or "Vendors", depending for what you are creating a reconciliation account.
In tab "Create/Bank/Interest" you will have to select a Filed Status Group. For reconciliation accounts, the SAP pre-defined value is G067.