Mistake on my tax return.

[MrWalletwithMothsonboard]

Hi

Wonder if anyone can advise. I am self employed but I do work for one employer and pay my own tax.

I thought I had filled it out correctly but looking at the calculations I can see the amount I was paid from the employer has been added in twice, resulting in a lot more tax being due!

It is a genuine mistake but I am reading that you can be fined for being careless! I am not sure how it happened and cannot go back to look at what happened - whether it is my fault or not. It is pretty obvious as the figures are identical.

Am I best to just phone them tomorrow? Any advice, bit worried about it all.

Which tax year? 13/14? You can amend the return and, assuming you didn't pay the tax yet, the due amount will be changed on HMRC's system. If it's 12/13 tax year then you can still amend but the overpaid tax needs to be reclaimed.

The penalties are calculated on underpaid tax, as you have overpaid then no penalties can be due. HMRC can obviously quiz you about the amendment but the likelihood of them bothering is small, unless you end up reclaiming thousands of pounds in tax.

Thanks for your answer. I spoke to them this morning and was told that I should ring again in 72 hours as system not updated yet.

Very nice guy, told me not to worry. I am such a worry wart! It was 2013/14.

go online and file an amended return ....