Q. I act as a DJ for parties and other events. For themed parties (e.g. Halloween, 1970s) I wear clothes to suit the occasion. Can I claim the cost of those clothes as an expense in my self-employed accounts?

A. The Taxman will not allow a deduction for the cost of ordinary clothes which are required 'for warmth and decency'. However, where the item is needed for safety purposes, like a hard-hat on a building site, the cost is allowable. The same applies for the cost of a costume worn to identify the person in a role, such as a barrister's legal wig and gown.

If your clothes amount to a costume for entertaining, then the cost is allowable. If you also wear those clothes for warmth and decency then the cost is not allowable. Try asking yourself: 'would I wear this when I am not working as a DJ'. If the answer is 'yes', the cost is not allowable.

Q. The Taxman has written to me saying I missed a small pension worth about £800 a year from my last tax return. He hasn't noticed that I also missed it off the last four tax returns. What should I do?

A. Best advice is to come clean immediately and tell the Taxman about all the missing amounts of pension income for all tax years. There may not be more tax to pay if the pension provider has already deducted tax at your marginal tax rate. However, if there is higher rate tax to pay there will also be interest due at 3% and possibly a penalty. By confessing all without delay you can qualify for a reduced penalty, down to say 15% of the tax due. We can help you with those penalty negotiations and may be able to get it suspended for up to two years.

Q. I run my own consulting company in the UK, which pays my Brazilian wife a small wage for answering the phone and preparing marketing materials. Can the company pay for her to complete an advanced English course at the local college?

A. Training for any employee can be charged through the company if it is relevant to the employee's duties or future duties. An ability to speak and write correct English is necessary for your business so the proposed English course is work-related training for your employee. Your company can pay for the course, and receive a tax deduction for that cost. There will be no benefit in kind charge for your wife. The company can also pay for travel to the course. You should list the duties your wife performs for the company, and both sign the document as part of her employment terms with the company. This description of her duties will justify the training cost, should the Taxman ever ask.

Q. I am self-employed personal trainer. I pay rent to various local gyms where I train my clients, supply my own uniform and make my own appointments. I have to look the part to get work, so I take body-building supplements. Can I claim the cost of those supplements as a business expense?

A. The supplements are a form of food, and as such it has a dual purpose; to keep you healthy and prepare you to undertake your work. So it is very unlikely that the Taxman would agree that your body-building supplements are tax allowable