Tax refund

Hi all

I submitted my tax refund online well in advance of the deadline but have not received anything back telling me how much I am due to be reimbursed. A lot of my colleagues have received these. Also the figure for my earnings was listed as 0 on my online form, but I changed this to the correct figures as I received from my employer. Is this a problem?

A lot of my colleagues anticipate the tax refund next week, even those who submitted the paper form just before the deadline.

Anyone know when I should expect to get some money / is it a worry that I have not yet received a letter?