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  • Underpayment from previous years

    Hello, Recently I checked my personal tax account and I got a tax adjustment and saw an "underpayment in previous years" of £963 (which I owe HMRC). My income tax has been automatically deducted by PAYE when I pay out my income. Why do I still pay less tax? As a result, the personal tax exemption for this year has been reduced a lot. Where can I check?
  • Apply Split Year treatment case 4 for 2021~2022

    Our family began to immigrate to UK in June 2021. But we only recently learned that we need to apply the "Split Year treatment case 4" on 2021~2022. May I ask if we can file back the Split Year treatment tax return for 2021~2022? How can we achieve ?