How can I get the Sales Tax /Sales Tax Totals or Getting actual amount without tax from ledgerjournaltrans table:

How can I get the Sales Tax /Sales Tax Totals:

Or

Getting actual amount without tax from ledgerjournaltrans table: 

ledgerJournalEngine.taxAmountJournal(_ledgerJournalTrans); // this will calculate the tax if you have ledgerjournaltrans line with you.

example for customer payment journal(LedgerJournalType::CustPayment) ;

LedgerJournalEngine ledgerJournalEngine = LedgerJournalEngine::construct(LedgerJournalType::CustPayment);

LedgerJournalTrans  _ledgerJournalTrans = LedgerJournalTrans::findRecId(5637290372,false);

        

TaxAmountJournal TaxAmountJournal = ledgerJournalEngine.taxAmountJournal(_ledgerJournalTrans);

getting GST calculations eith sales and purchase lines:

salesLine = SalesLine::find(custConfirmTrans.SalesId, custConfirmTrans.LineNum);

Tax::calcTaxAmount(salesLine.TaxGroup, salesLine.TaxItemGroup, Systemdateget(), salesLine.CurrencyCode, salesLine.LineAmount, TaxModuleType::Sales);