So found this forum having the exact same issue (either top or bottom panel was aligned, but never both) even though I've not had this issue historically - but tax forms only come around once a year.
If I changed the alignment offset, it would just change which one was out of alignment. Saw some notes about updating the driver and found the root of the issue. When installing the printer to use for the first time whenever I would have done it I just added it via the printer and devices page of Windows since it completes it super easy once it is connected to wifi. HOWEVER, it seems that in doing this, it uses some generic Microsoft driver that isn't the third party printer's driver software (I think somewhere online said it at least used to not do this or something, so could be cause for why this is happening NOW). For me the default driver it used was called "Microsoft IPP" (can find under device manager as to what driver it is using).
So in my case, I have a Brother printer, so I went to their website and downloaded the full software package for my printer (adds an app to the computer, offers fax help, etc) around 460 MB in all. I didn't previously have this software on my computer. I then used the Brother Application (NOT the Microsoft Printer & Devices page) to add my printer which installed it with the brother driver vs the Microsoft IPP driver. Printed a new page after removing the alignment adjustment I'd previously made and it printed perfectly on the top AND bottom panel.
Windows made it so easy to add the printer, I never stopped to think it wasn't going out and finding the Third Party driver to install it - looking back, seems so obvious.
