What happens if your tax return is not processed?

gt94sss2 Posts: 5,603
Name Dropper Combo Breaker First Post First Anniversary
I sent my 2022/23  paper tax return to HMRC before the October deadline.

According to the "Check when you can expect a reply from HMRC" service I should have received by tax calculation by now.

However, when I ask HMRC via webchat they keep saying they have my return but it has not yet been processed so have no idea how much is due (and/if there are payments on account)

Given 2022/23 tax payments are due by the 31st and I have been told "If you owe anything you need to pay it by the due date" I would be grateful for any advice and in particular where I would stand if I pay the wrong amount given I don't know what is due..

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