Hello there, @Faz333. I'm here to share some information on why those expenses are categorised as disallowable. I'll also lay down a solution to ensure your expenses are properly categorised so your tax summary report will also be accurate.

The QBSE program will categorise your transactions as allowable or disallowable based on what specific category you've chosen upon categorisation. This is because each category is associated with specific SA103F box numbers which decide if it will be allowable or disallowable expenses on your Self Assessment tax return.

Please take a look at this article for more information contains the SA103F box numbers, QuickBooks account detail types, and information about what expenses you can deduct and what you can't: Allowable and disallowable expenses explained.

Furthermore, you can reach out to our Customer Care Team to perform a screen-sharing session to assist you with locating the incorrectly categorised expense transactions that caused them to appear in your disallowable expenses.

In case you need additional assistance on what specific account to use for tracking these expenses, I recommend seeking help from your accountant to ensure that your books are accurate. They'll also be able to provide more expert ways of dealing with this situation.

To change the category, simply go to the Transactions page, and then find the expense. Click the category and recategorise it to the correct one.

In case you'd like to take care of your self-assessment taxes on your own in Self-Employed in the future, I'll add this guide: Self Assessment for Income Tax checklist for QuickBooks Self-Employed.

This thread's still open if you have more questions about your transaction categories. If there's anything else I could do for you about your reports or any other things in Self-Employed, feel free to add the details to your reply. Have a good one.