The Tax-Calculator is an online invoicing tool that will help you work out your self-assessment owed The Tax Calculator has a built-in online invoicing creator so that you can set up and print invoices easily for your customers. with this tax calculator it is easy to manage your clients and has been designed to assist you with your tax return. This will ensure that there are no surprises when you perform your self-Assessment tax return. The Self-Employed Tax Calculator supplies a variety of Self Assessment tax tools to guide you through the course of the tax year. if you are self employed and are looking for a way to sort out your self-assessment-tax, this is the website for you. Self-employment Tax Calculator is easy to use and does all your online invoicing for you, simple to use and easy to navigate. why pay for expensive accountants to do your tax return? with this online invoicing tool you will find it Quick and easy set up, you can start working immediately, you get to stay in control - managing all your info in the cloud with one easy to use online invoicing system. you are able to be online, anywhere, anytime, you can access and manage your account 24/7, you get to know your employment tax liability, keeping an eye on your employment tax return month by month so you can save as you need to.