The relation between the table TaxTrans and the table GeneralJournalEntry only contains the field TaxTrans.TransDate, but the field TaxTrans.Voucher.

For this reason, if you try to filter only those general journal entries, for which a tax transaction exists, by adding the relation from table GeneralJournalEntry to table TaxTrans, the filter will find ALL general journal entries of any date, on which a tax transaction existis, no matter whether a tax transaction exists on the voucher or not.
The request is: Add the field TaxTrans.Voucher to the relation.