I have a page jump issue when printing advance PDF with alot like (100+) of serials (inventory details) with

<td align="center" colspan="4">${tranline.inventorydetail}</td>

its prints all the serials but its jump one page and left the first page blank (only with title and logo...) I know there is a simple solution for that but cant remmeber

You might to insert your serials as rows in the table, like each row has three serials for example. The reason why it is jumping is because the <td> that contains all the serials no longer fit in the page, so it prints the whole table row to the next page.