Hello @Tiddle12,

Let me help share how you can start collecting sales tax for your clients in QuickBooks.

To start with, we'll have to turn on this feature first based on the product version used by your clients. Let me show you how.

In QuickBooks Online:

1. Go to Taxes.
2. Select Sales tax.
3. Click Set up sales tax.
4. Review and make sure your business address is entered accordingly.
5. Choose an agency where your client needs to pay sales tax.
6. Select the appropriate filing frequency.
7. Click Save.

In QuickBooks Desktop:

1. Go to Edit.
2. Select Preferences.
3. Click Sales Tax.
4. Under Company Preferences, select Yes.
5. Add a sales tax item base on the rate and agency used by your client.
6. Make sure to select how you wish to assign the sales tax item and the filing frequency.
7. Click OK.

In the same manner, here's a couple of articles you can use to learn more about how you can start collecting sales tax:

• Set up where you collect sales tax in QuickBooks Online
• Set up sales tax in QuickBooks Desktop

On top of that, I've also included the following references below for a compilation of articles you can use while working with us:

• Pay and manage sales tax in QuickBooks Online
• Pay and manage sales tax in QuickBooks Desktop

If you have any other questions, please let me know in the comments below. I'll be here to lend a hand.