An accountant is there to save you money and they can easily save you more then their fee. If its only your tax returm then expect to pay only around £200 max.
You may be skint at the moment but you will be worse off if you try and do it yourself (well I would

).
Tax offices are good but they only work out your tax, not save you money.Im not saying your not capable of doing it yourself but I know of a few tradesmen who went down the road of "I can do it myself" and found themselves outta pocket.
Trust me on this one bud go see an accountant...... but good luck which ever you choose.
Bob