Filling in tax return

[gloop]

Hi. I'm trying to fill in my tax return at the moment and have realised that I'm missing my P60 from the jobcentre from when I was signing on. I can work out from bank statements exactly what I got from them in that tax year. Is this an accurate enough way to do it? It's not a huge amount and I was just wondering how important it is I get it exactly right. I might give the jobcentre a ring to see if they can find out for me. I'm not sure if they'd be able to just tell me over the phone.