thistle7

Hello, and thank you in advance your advice. I sold some shares for the first time in 2020/21 tax year and incurred an allowable loss. I did not file a self assessment that year (and had no reason to file in prior years either). The first self assessment I filed is for the 2021/22 tax year, in which I did not reference the allowable loss the previous year. I understand I should be able to register this allowable loss as it's still within a period of four tax years, Despite looking I'm afraid I cannot locate how to enter a self assessment for the 2020/21 year to be able to do this. Can you advise please, and also what the penalty would be for doing so at this late stage? Thank you.