Step 1: Check whether Datasource are available in RSA5.
If yes, no issues just activate and use it.
Step 2: Go to SPRO -> IMG -> Financial accounting new -> financial accounting global settings -> Ledgers -> Define Ledgers. Next -> Define and Activate Non-Leading Ledgers (below).
After doing this go to Tcode /nfaglbw01 & select your totals table & execute. This will create an extract structure for your parallel ledger.
Step 3: Next u will be able to see this in RSA5, once you activation is done it will be availablein RSA6.