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  • Unexpected request for a large tax payment with no ready explanation

    Hi - I have completed my self assessment for 203-24 and have (to my complete surprise) been told I need to pay thousands in underpaid tax (I am on PAYE). The advisor I spoke to said she could not provide any advice, for reasons I am not clear on. Tax code checker process on the HMRC site suggests the amount of tax I paid under that tax code was correct. Before I pay it I just want to make sure it has some likely explanation - is it possible that it's a tax code issue (i.e. is that the most common / likely reason for such surprises?). I had two separate employments in that tax year so assuming that's it as have no other idea! Grateful for any thoughts/past experiences, thanks very much