If you have been charged interest you would need paper work documenting this.
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Hi, I am self employed and travel to provide service to clients based on assignments procured through an agency. The agency provides a milege reimbursement of less than £0.45 per mile. Eg. Travel 40 miles to a job. Agency pays 40 x £0.20 = £8.00. Allowable HMRC 40 @ 45p = £18.00 Difference between allowable claim under HMRC £(18 -8 = 10). How should I enter this in my tax return?