You filed. Now build a system so you never have to panic again.
- First Year Self-Employed: A Checklist So You Never Panic in January
Just started freelancing alongside a PAYE job? Here's what to do in your first year: when to register, what to record, and the January bill surprise.
- Fixing Tax Return Mistakes and Getting HMRC Refunds: The Complete Route Map
Made a mistake on your tax return or owed a refund by HMRC? Here's how to amend, claim overpayment relief, get a P800 refund, and chase a stuck repayment.
- HMRC Repayment Taking Too Long? Here's What's Happening and How to Fix It
HMRC repayment stuck in security checks or pending for months? Here's why it's delayed and the exact steps to chase it — including what to say when you call.
- Made a Mistake on Your Self Assessment? Don't Panic — Here's How to Fix It
Made a mistake on your Self Assessment? You have 12 months to amend it. Here's what counts as a mistake, how to correct it, and what happens to overpaid tax.
After Filing: Common Questions
How do I fix a mistake on my Self Assessment tax return?
You can amend your return online up to a year after the filing deadline. Log into your HMRC account, find the return, and correct the error. See ourfixing mistakes guide for the full step-by-step.
Why is my HMRC repayment taking so long?
HMRC says repayments take 2 weeks, but security checks and "no repayment indicators" can delay them by 3+ months. The fix is usually calling and asking the right questions. See our HMRC repayment delays guide.
What should I do after filing my Self Assessment?
Check your payment confirmation, set up a record-keeping system for next year, and if you overpaid, chase your refund. Ourfirst-year checklistcovers the year-round systems that prevent future panics.
How do I avoid panicking next January?
File early (you can file from 6 April), keep digital records throughout the year, and set a December reminder. If you're moving to Making Tax Digital, start with ourMTD for income tax guide.