I have claimed all vehicle expenses and at the end of the TY I want to make an adjustment for non-business use so that I don't over claim. How do I do this?

Let's work together so you can create a cash adjustment in QuickBooks Online (QBO), imdad.

Journal entries are the last resort for recording transactions and creating adjustments. They enable you to transfer money across accounts and ensure that your books balance in a particular way. However, use them only if you are following your accountant's advice or if you are an accounting expert. To do that:

1. Click + New and select Journal Entry.
2. Select an account on the first line. Enter the amount in the appropriate column depending on whether you need to debit or credit.
3. Select the other account you're moving money to or from in the next line. Enter the same amount in the opposite column.
4. Check if you have the same amount in the Credit and Debit columns. 
5. You may also provide a description in the Memo section so you know why you created the journal entry.
6. Click Save and Close.

Additionally, you can view your monthly supplier payments in QBO by running an expense report every month.

Let me know whenever you have additional questions concerning your expenses. The Community is always available to assist you further. Keep safe and have a good one!