I'm here to answer your questions, JackBrown91.
Your Estimated Employment Income is your self-employed income and any other income. We want to clear that if you're adding income in the estimated employment income from the Tax Profile section it'll only be there as something for you to reference when filling in the SA103F form on HMRC website. It won't affect the Tax Summary report or income tax calculation within the QuickBooks product itself.
The Tax Summary report includes boxes 15-47 of the SA103F .Box 47 being net profit. You can add any business income via the transactions section and that will impact the tax summary.
The QuickBooks product does not take PAYE into account it has not been made to deal with already taxed income.
We wanted to add some clarification on the correct process for accounting for P45 income within Self Employed. It is correct you would record it in the tax profile however it would be the personal allowance section you would adjust as the PAYE would affect how much allowance you have left.
If you have used up the allowance you can amend the figure in that personal allowance section to zero. This will then mean the income tax is calculated correctly.
You can review the information entered in your Tax Profile settings. And, the UK Business and Self-Employed Tax Centre also offer a lot of great information on being self-employed.
Feel free to leave a comment below if you have follow-up questions. I'm just right here anytime you need help.