How to avoid common mistakes on your tax credits claim form
If you make mistakes or don't answer all the questions that apply to you when filling in your tax credits claim form, it can cause delays. This means you will have to wait longer for your first payment.
Filling in the form
Your claim form will be read by a machine so it's important to:
- use black ink
- write inside the boxes - use one box for each letter and leave a space between words
- use capital letters
- leave blank any boxes that don't apply to you - don't put a line through or write not applicable
If you make a mistake just put a line through it - don't use correcting fluid. Write the correct information underneath the box.
If you're responsible for more than two children or use more than one childcare provider use the additional pages that came with your claim form.
If you've got more than five children or use more than three childcare providers make photocopies of the pages before filling them in.
To avoid delays, make sure you fill in the whole form but remember, don't put a line through anything that does not apply to you - just leave it blank.
Avoiding common mistakes
The following things will help you to avoid making common mistakes:
When to claim as a couple
If you're in a couple you must make a joint claim - you can't claim as a single person.
You have family abroad
If you have family abroad you may need to make either a single or joint claim, depending on your personal circumstances. You can check what type of claim you should make by following the link below.
You already get tax credits but your income is now too high to get any payments
If you're already getting tax credits, or the Tax Credit Office have written to you explaining that your income is currently too high to get any tax credits, don't make another claim. If your circumstances have changed call the Tax Credit Helpline.
You and your partner work
If you and your partner work - whether employed or self-employed - make sure you fill in both your income details in part 5.
If you have to estimate your income
On question 5.7 about estimated income, only mark one box - yes or no - not both. If you've estimated any part of your income your answer should be yes.
You have – or think you may have - a disability
On question 1.11 about disability, you should only tick the box if you work for 16 hours or more a week and both of the following apply:
- you have a disability which makes it hard for you to get a job
- you are getting, or have recently been getting, certain sickness or disability benefits such as Disability Living Allowance or Incapacity Benefit
- You have a disability - can you get extra Working Tax Credit?
Check you've entered all official details correctly
Here's a checklist of information you may need and where to find it.
| Information you'll need | What it looks like | Where to find it |
|---|---|---|
| Your National Insurance number | It's two letters, six numbers, then one letter, like this - AB 12 45 89 C |
You'll find it on:
|
| Your Child Benefit reference number | It's eight numbers, then two letters, like this - 23459876AB | You'll find it on any Child Benefit letter |
| Your employer's PAYE reference- if you're employed | It's three numbers, then a slash, then a letter and three more numbers, like this - 123/H345 | You'll find it on your latest payslip, your tax code notice or P60. Ask your employer if you're not sure |
| Your tax reference - if you're self-employed or working in a partnership | It's a ten digit number like this - 9876556789 | You'll find it on page one of your tax return |
If you've made a mistake writing down any information, for example your Child Benefit number does not match your child's name, or the number you've given is wrong, the Tax Credit Office will have to contact you. This could delay your claim.
Check your bank account details
For questions 6.5 - 6.9 on the claim form, make sure you provide bank or building society account details for your money to be paid into. If you don’t, your payments could be stopped after four weeks.
You only need to provide two separate bank accounts if you want your Child Tax Credit payments and Working Tax Credit payments paid into different accounts.
Make sure you've written the following correctly in the boxes shown:
- name(s) of the account holder(s) - usually your or your partner's name in box 6.5
- account number in box 6.6
- branch sort code in box 6.7
- building society account roll or reference number in box 6.8
- Find out more about how tax credits are paid
Check you've given the correct information
It is very important that you give the right information on your claim form. The Tax Credit Office works out how much to pay you from what you tell them about your income and family circumstances.
Check you've given the correct information about:
- your income - the total amount of money you have coming in
- the benefits you are getting
- your childcare arrangements
- your partner
- your children
- your work and hours
If you have supplied incorrect information, you may end up getting too much money and have to pay it back, and you may get charged a penalty.
Check your form before you send it
Before you send the Tax Credit Office your form, check you've answered every question that applies to you - missing information could mean your claim is delayed.
Remember not to put a line through anything that does not apply to you.
Check you've given the correct information. If you've supplied the wrong information, you could get charged a penalty.
Make sure you sign and write the date on the form - if you're in a couple, both of you must sign it. Use the return envelope provided and don't fold the form.
More useful links
- Putting mistakes right once you've sent in your tax credits claim
- When can you expect your first tax credits payment?
Provided by HM Revenue and Customs

Student finance
Get help with rates
Passports
