How to start a line from a fixed position using XML publisher RTF format

Dear all,

Let me explain further what I mean. I am working on a check format using XML publisher RTF format. I want the remittance advise to start on line #20 for instance, no matter if there is anything printed in #1 - #19 or not.

Moreover, ideally, the remittance advise on all subsequent checks should start from the same position as it's on the first check. However, during my testing, each check has its remittance advise start from a slightly different position. They don't look good on pre-print check stock.

Is there a way to set a fixed position for each line in the RTF template?