It's easy to import the custom form styles in QuickBooks Online. Allow me to help you.
The first thing we need to make sure of is that we use the correct code or keyword with angle brackets (<>). This way, we can map it properly when we import the template. You'll want to download our catalogue or use our sample files.
Then, save the file in a .docx format. Note that this is the only supported file type when importing custom form styles.
Additionally, I'd like to know what problem you encountered so I can provide a resolution. The Community Team is unable to give you a call. However, you may follow these steps on how to reach out to our Support Team:
Click the (?) Help icon and enter Talk to a human (then type it again when prompted).
When asked by the bot, enter "Custom Form".
Select I still need a human, then proceed with Contact Support Team or Get help from a human.