I'll be more than happy to help you split a manually entered Deposit. When creating a Bank Deposit from the New + icon menu, you're able to check off as many payments and apply as many sales credits, fees, or miscellaneous expenses as you need. Check out the steps below to accomplish this:
Split a manual Bank Deposit
From QuickBooks Online, click the New + icon and select Bank Deposit.
Where it says Select the payments included in this deposit, check off each item that comprises this batch deposit.
If there are additional sales or charges needed to appropriately total the transaction, enter them below Add funds to this deposit. Select an account and amount for each line as necessary. Expenses entered here will require a negative (-) amount to correctly reduce the total deposited.
Click Save and close.
This enables you to split deposits in the same manner explained above but in manually entered transactions.
We also offer a guide on entering split transactions in the register that you may find helpful. Please keep in touch with me here on your progress with this, I'm always available for all of your QuickBooks questions. Thanks for coming to the Community, cheers to a safe and relaxing weekend.