Hi Andy:

The default template used for the report is causing the issue. If you have a Street2 in your company address, it is causing the height of the header to increase and overlap the page in the report.

Solution: Customize the report to match your requirements or move the Street2 into the Street field of the Address.

I was able to replicate your issue using the demo data. Screenshots have been provided below for your reference.

Report without Street2 in the Address 

The same Report with Street2 in the Address - I moved the "Suite 3400" part of the Address to Street2 before generating the report 

EDIT:

If you have administrator access in Odoo, you can customize the paper format used by the report and increase the size of the top margin to meet your needs. The steps are as follows:

1. Activate developer mode by going to Settings > General Settings, scrolling all the way down and clicking on Activate the developer mode 

2. Go to Settings > Technical > Reporting > Paper Format 

3. Click on either A4 or US Letter depending on the standard paper size you use. This will open that format in the form view.

4. Select Action > Duplicate and change the Name to something that is unique and easily identifiable. For example, A4 - Repairs.

5. You will need to experiment with the value in the Top Margin (mm) field by increasing it to get the exact fit. You can also reduce the Bottom Margin (mm) to make more space for the content.

6. In the Associated reports field select Quotation / Order. If you see more than one, you will have to select them by trial and error i.e. select one, regenerate the output and see if there was a change in the output. If not, go back and select the other one and regenerate the output and verify. This setting ensures that this custom format is used for this output only.

Here's a screenshot of what the custom paper format settings may look like after making your changes.

You'll have to check your margins on your paper format and have a look at the repair order QWeb view in order to adapt your template. Where to find these depends on your Odoo version.