What this guide covers
SimpleTaxFlow can show both planning estimates and calculations returned by HMRC. Always check which one you are viewing before making a payment decision.
1. Choose the correct tax year
Open Filing and select the tax year you want to review. A current-year estimate and a finalised HMRC calculation can have different purposes and values.
Open Filing2. Check the source and status
Look for whether the amount is an estimate from your records, a calculation requested from HMRC, or a finalised figure. If records changed after calculation, request or wait for an updated HMRC result before relying on it.
Review your tax position3. Read the breakdown
Review total income, taxable income, Income Tax, Class 2 and Class 4 National Insurance where applicable, Personal Allowance, and any other lines returned. Compare unexpected amounts with the underlying income records.
Review reports4. Note each payment date
Distinguish the balancing payment from first and second payments on account. Use the dates and values returned for planning, but pay through HMRC's official service and seek advice when the calculation does not match your circumstances.
Prepare for year endBefore you move on
- The tax year and calculation source are clear
- The calculation reflects the latest records and submissions
- Tax and National Insurance lines were reviewed
- Balancing payment and payments on account are not confused
Put the guide into practice.
Open the relevant workspace and complete the next step with this guide available in another tab.
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