I Made a Mistake on My Tax Return — What Should I Do Now?
Sean Davern
2 Jul 2026
Discovering a mistake on a tax return can be worrying.
For many taxpayers, the first reaction is panic.
Discovering a mistake on a tax return can be worrying.
For many taxpayers, the first reaction is panic.
Many taxpayers assume that older tax issues eventually disappear with time.
In practice, HMRC can often review historical tax matters much further back than people expect.