Welcome to the QuickBooks Community! Thanks for reaching out to us here. QuickBooks Online is a great software that helps balance your books. I would be happy to provide some information.
There currently isn't a way to split vendor invoices per cost center. However, there are two options you can chose from. The first option would be to use Classes. Here is a helpful guide on getting started with classes. At this time, The Classes feature is only available with the QuickBooks Online Plus subscription. The second option would be to wait until the transactions reach the For review section in your QuickBooks account. From here you can split the bank transaction. Here is how:
Splitting a Bank Transaction
From QuickBooks Online, navigate to the Banking tab and the For Review section.
Click the transaction you need to assign multiple Payees and select Split.
For each part of the split, enter a Category, a Payee, and the Amount. Click Save and add once finished.
If you have any other questions, feel free to reach out here.
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