i want filter main account from sub coloums

select firstOnly ledgerJournalTransAccrualTrans
where ledgerJournalTransAccrualTrans.RefRecid == ledgerJournalTransAccrual.RefRecid
&& ledgerJournalTransAccrualTrans.RefTableid == ledgerJournalTransAccrual.RefTableid
join ledgerJournalTransAccrualTrans
where ledgerJournalTransAccrualTrans.LedgerDimension == PrepaidLedgerAccount

i am giving the parmPrepaidLedgerAccount it is showing error