Hi. My name is*****'m looking at your question now and will post my answer or ask for more information here in a short while.
Can you tell me how much the 2015/16 loss was and how much your income for 2014/15 before personal allowances was please.
What was the start date of your business?
You have a choice. As you have no income in 2015/16, you have the option to take the loss back to 2014/15 by putting the loss figure of £18,824 in box 34 of the SA103 (short) pags here, working out how much that would reduce your 2014/15 tax and NIC liability by and putting the reduction figure in box 15 of the SA110 pages here. It's an all or nothing claim so you will waste some of your personal allowance for 2014/15 but not much. Alternatively, put £18,824 in box 35 and carry forward the loss for use against future profits of the same business only. Based on the information provided I'd take the loss back to 2014/15.
I hope this helps but let me know if you have any further questions.
1 SA110 is part of the tax return so it should go to HMRC. If you are using tax return software, it will be automatic.
2 You should have paid tax of £3,687.40 and Class 4 NIC of £1,843.29 in 2014/15. As your taxable income was £18,437 (£28,437 - £10,000) and the loss exceeds that, you should get all the tax and NIC paid back. So, put £5,530.69 in box 15 of SA110. Your tax return for 2014/15 will tell you whaht your gross tax and NIC liability was.
As you made a loss in 2015/16, you shouild not need to pay Class 2 NIC which is £145.60 for the year but if you do, it will go towards your state pension. Take a look at the notes here. As you have your 35 years, you probably don't need to pay.
Would you mind rating my answer before you leave the site please.
If you are posting a paper return. keep a copy and chase up the tax repayment after 5 weeks on the number here. If you submit it online, chase up the tax repayment after 4 weeks on the same nuimber.