Login In

Interactive Diagnostic

Stratford-upon-Avon

13 The Courtyard
Timothy's Bridge Road
Stratford-Upon-Avon
Warwickshire CV37 9NP

01789 294484

enquiries@gjassociates.co.uk

London

7-8 Stratford Place
Mayfair
London
W1C 1AY

0207 495 0304

enquiries@gjassociates.co.uk

What happens if you discover a mistake on your tax return? The good news is that errors can usually be corrected, but it is important to take action as soon as possible to avoid paying the wrong amount of tax or missing out on a possible refund.

If you realise that you have made an error after submitting your self-assessment tax return, you can normally amend your return within 12 months of the self-assessment filing deadline. The amendment can be made online or by submitting a revised paper return. For example, your self-assessment for the 2024-25 tax year can usually be amended up to 31 January 2027.

If you amend your return online, your tax calculation will be updated immediately and will show whether you owe additional tax or are entitled to a repayment. Any changes may also affect payments on account.

If the 12-month amendment period has passed, you will need to contact HMRC in writing. This applies if you need to report income that was missed from your return or if you believe you have paid too much tax and want to claim overpayment relief.

Overpayment relief claims can generally be made up to four years after the end of the relevant tax year. You must explain why you believe the tax has been overpaid, provide details of the amount involved, and confirm that the information provided is correct and complete.

Source: HM Revenue & Customs Tue, 04 Aug 2026 00:00:00 +0100

Grenfell James Technology Adoption Index

How does your business perform against others adopting financial tech? Find out with our interactive diagnostic:

1.

How does your business receive invoices?

A)

Invoices are mainly received in paper form

B)

Invoices are mainly received by email

C)

Invoices are emailed then automatically forwarded to a designated mailbox

2.

How are purchase invoices processed?

A)

Invoices are entered manually

B)

Invoices are attached to manually raised invoices

C)

Automated software (e.g. ReceiptBank, 1Tap, HubDoc etc) collates invoices

3.

How are accounts processed?

A)

Using Excel/paper-based

B)

Using Computer-based, offline software

C)

Using cloud-based accountancy software

4.

How often is business data revised?

A)

Data is updated annually

B)

Data is updated quarterly

C)

Data is updated monthly or more often

5.

How is banking updated for your business?

A)

Banking is updated manually

B)

Banking is updated by imports

C)

Banking is updated via a live feed

6.

How are bank payments made?

A)

Bank payments are manual

B)

Bank payments are made using bulk imports

C)

Bank payments are made directly via accounting software

7.

How are bank receipts reconciled?

A)

Receipts are chased and reconciled manually

B)

Receipts are chased and reconciled automatically

C)

A third-party platform is used to chase debts and collect fees

8.

How often are management reports produced?

A)

No reports are provided

B)

Reports are provided but often too late to be valuable

C)

Reports are automated with real-time information

Score 8-12:

Curious Exploration

Your financial technology phase is Curious Exploration

% of respondent businesses are in this phase too.

Switching accountancy systems may seem like an upheaval, but can be much more straightforward than most businesses imagine. From talking to our clients, they have found moving from paper invoicing and desktop-based accounting software to the cloud and apps quickly makes the transition process a worthwhile investment of time. Digital accounting solutions bring in streamlined processes, up-to-date business data and greater confidence in the accuracy of information when making financial decisions.

Grenfell James works with your team to fully assess the needs of your business and minimise the impact of any transitions for solutions we recommend.

Find out more about App Advisory

More

Score 13-19:

Measured Discovery

Your financial technology phase is Measured Discovery

% of respondent businesses are in this phase too.

Once cloud accountancy software is in place, there’s still plenty of scope to improve your accountancy processes and make sure your business is maximising the benefits of adopting a digital accounting solution. Grenfell James assesses each business to understand how any implemented solutions are being used, identify areas for improvement and the needs of the business overall to support your business goals and achieve success.

Our team of experts can discuss a range of time-saving automation and get different apps and cloud-based solutions talking to create and manage a digital accountancy eco-system to help your business grow.

Find out more about App Advisory

More

Score 20-24:

Bold Innovation

Your financial technology phase is Bold Innovation

% of respondent businesses are in this phase too.

You know the benefits of accounting technology and the impact it can have on your business goals. If you want to take it a step further, our team can conduct a systematic review of your processes, apps and business goals to ensure your digital accountancy ecosystem is keeping pace with the changing needs of a growing business.