Hello there, Wanghu01. Categorizing the rental expense in QuickBooks Self-Employed depends on your specific business processes and setup. We can't directly recommend a specific account for you.
To help you and for accurate categorization of your rental expense, refer to this article for more information: Schedule C and expense categories in QuickBooks Solopreneur and QuickBooks Self-employed.
It is a good idea to consult your accountant regarding categorization. They can help you identify the correct account, ensuring your records are accurate and in tax compliance.
If you have any additional questions, let us know. We're here to help.