The Receive Payment function automatically inherits the class details from the invoice that's being paid. This is why the option to choose a class isn't visible in that screen.
However, you can certainly assign classes to grants without an invoice using two separate options.
First, connect your bank and download the payments directly into your account. Then, select the classes when adding categories to them. Here's how:
- Go directly to the Pending tab and select the transaction.
- Once you see more details, look for the Class field just beside Transaction type.
- Choose the appropriate class and click Post.
Second, record the grants using a sales receipt. See this article about this option for more details: Track your transactions by class in QuickBooks Online.
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