Thank you for reaching out to the Community with your questions!
I do have some suggestions for you and I apologize that you have not received a response yet.
So in your Quicken software, as you may have already noticed, your tax lines get assigned to your categories. So it will be imperative that you use business categories/categories with assigned tax lines on the related transactions.
That being said, I can direct you to some reports that you may find helpful. To access reports you will go up to the "Reports" tab at the top of your Quicken software.
From the menu provided, select the first option, "Reports & Graphs Center". That will populate a box on your screen with many options. The options can seem overwhelming until you are familiar with them all. Click on one of the headings provided. For example, "Business", as I have below.
As you can see, this will open up and give you a variety of reports to choose from that are business-related. Another good option for what you are doing would be "Tax". And as you can see below you have even more options.
It's difficult to say which report you will find most useful, but the best way to find out is to just start running a few. If you click on one, it opens further and you can choose to "Customize" the report to fit your needs, or just "Show Report". The customization box (pictured below) has many options as well.
In here, you will click on each tab at the top of the box, and select anything and everything that you want to include or exclude from the report you are running. When you have finished your customizations, click "Show Report". If something is missing or incorrect, that means it was not assigned the correct category on the transaction.
I hope this helps point you in the right direction! If you have any more questions or hit any speedbumps along the way just let us know and we would be more than happy to help! Also, feel free to just let us know if you found this post helpful or not.
Quicken Alyssa