QuickBooks Self-Employed UK – Mileage tracker not appearing in Self Assessment Summary?

In QuickBooks Self-Employed, the Mileage Tracker works as a logbook rather than a direct accounting ledger. The Potential mileage deduction of £1,160.39 shown in your mileage tab is simply an estimate or a preview based on HMRC's standard flat rates.

Because it is a tracking tool, QBSE does not automatically generate an expense transaction for it to push your allowable expense on the Self Assessment Summary page.

The mileage calculation sits inside your Mileage tab as a record to prove your claim to HMRC if they ever ask for it.

To get that figure into your Self Assessment figures inside QuickBooks, you have to manually enter it as an expense transaction.

Here's how:

1. Go to Transactions and click New transaction.
2. Set the transaction type to Expense.
3. For the Amount, enter your calculated deduction: £1,160.39.
4. Set the date to the last day of that tax year (e.g., 5 April 2026).
5. Categorise it under Car, van, and travel expenses.

Once you do this, your QuickBooks Self Assessment summary will accurately reflect the £1,160.39 as an allowable expense alongside your £9 parking charge.

Since you have already submitted your 2025–26 Self Assessment to HMRC, you will need to log into the HMRC portal directly to make an amendment. HMRC allows you to amend your return easily online, usually up to 12 months after the standard filing deadline.

You may refer to this article for more information about allowable and disallowable expenses in QuickBooks Self-Employed.

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