Starting from April 6, 2023, the thresholds for Self-Assessment change for PAYE taxpayers. This article explains the transition from £100,000 to £150,000. If your income falls within this range, HMRC may exempt you from Self-Assessment. It's crucial to be aware of other qualifying factors, especially unreported income. The article also touches on the importance of predicting profits for businesses with unconventional fiscal year endings.
Changes in Self-Assessment Threshold: What You Need to Know

Software
tax return thresholds
https://www.copiawealthandtax.co.uk/news/reminders-about-your-tax-return/