First time tax return - DIY or pay accountant?

[Cambiodenombre]

Short story is I need to fill out a tax return for first time for 2013-4. First problem is I don't think I have all the right paperwork I need because I didn't realise I'd have to do a tax return and therefore mislaid it (stupid I know) however I can get my hands on that if needed. I'm concerned about doing actual tax return though. Is it worth trying to do it myself or paying an accountant to do it! If so how much am I looking at?

Also what paperwork do I definitely need?

Many TIA

If you are a higher rate taxpayer, the other points of interest on the tax return will be pension contributions and Gift Aid payments - if you've made any of these then you can claim back the difference between higher and basic rate as relief. I've done this on my tax return and found it fairly straightforward.

Thanks all. Hijack away fuckwitterry

I have to do a tax return as a company director, even though I earn very little. I do my own despite my phobia for most things financial.

Its quite straightforward. The information buttons often answer my queries. Getting something like the Which guide can help explain.

But I have a low income, and otherwise just have to enter savings info - this is nicely provided for me online (my bank has a document which lists all my accounts and the interest paid and whether they are taxed at source or not).
The key documents are your P60 or P45, if you have lost them I believe you can get duplicates. You have until the end of Jan to do online - it works the tax out for you at the end.