How to show table from QTableWidget in txt file?

Hi,
I am trying to extract all items of my table and stream to txt file.
This is what I have done

Code:

QFile file("/home/ramraj/Desktop/bill.txt");
    if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
         qDebug()<<"file not open";
 
       QTextStream out(&file);
       QString companyName=ui->companyName->text();
       QString companyAddress=ui->addressLabel_2->text();
       QString companyPhone=ui->phoneLabel_2->text();
       QString companyEmail=ui->emailLabel_2->text();
       QString companyVAT=ui->vatLabel_2->text();
 
       out <<"                                       "<<companyName<<endl;
       out <<"                                       "<<companyAddress<<endl;
       out <<"                                       "<<companyPhone<<","<<companyEmail<<endl;
       out <<"                                       "<<"VAT No.:"<<companyVAT<<endl;
       out <<"                                       "<<"ABBREVIATED TAX INVOICE"<<endl;
       out <<endl<<endl;
       out <<"Bill # :"<<endl;
       out <<"Date   :"<<ui->currentDate->text()<<endl;
       out<<"Payment Mode: Cash"<<endl;
       out <<"-----------------------------------------------------------------------------------------------------------"<<endl;
       out <<"ID\t" <<"Particulars\t\t\t"<<"Rate\t\t"<<"Quantity\t"<<"Amount"<<endl;
       out <<"-----------------------------------------------------------------------------------------------------------"<<endl;
       QString textData;
       int rows = ui->billTable->rowCount();
       int columns = ui->billTable->columnCount();
       for (int i = 0; i < rows; i++) {
           for (int j = 0; j < columns; j++) {
 
                   textData += ui->billTable->item(i,j)->text();
                   textData += "\t\t";
           }
           textData += "\n";
 
       }
       out<<textData<<endl;
       out<<"---------------------------------------------------------------------------------------------------------------"<<endl;
       out<<"                                                               "<<"Total:"<<ui->subTotal_2->text()<<endl;

But,I am unable to get good alignment.
Here is what I have got:
Attachment 13191
Please,could anyone solve it?