@Ini : No need of Typewriter !

i found a solution.i used QPainter::drawText() to align the text at a desired location on the Pre-Printed form (paper)

Here is the Code :

QPrinter printer(QPrinter::HighResolution);
printer.setPaperSize(QPrinter::A4);
printer.setOrientation(QPrinter::Portrait);
printer.setFullPage(true);
QPainter painter(&printer);
QPointF pt;
pt.setX(20 * (printer.width()/printer.widthMM()));
pt.setY(20 * (printer.height()/printer.heightMM())) ;

painter.drawText ( pt, "prints at 20mm X 20mm");

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Thanks all , for Replying .