Hello, how do add the pay tab to my invoice

I'll guide you on how to add the pay tab within your invoice, Jclev.

QuickBooks Self-Employed (QBSE) allows you to send invoices with a pay now link and accept online credit payments. 

You can set up online payments so the customers can pay you for their invoices electronically. This feature isn't turned on by default. To do so, follow the steps outlined below:

1. Go to the Invoices menu and create a new invoice.
2. Select Create invoice.
3. Select the Set up payments to begin setup.
4. Follow the steps, then select Activate payments.
   
5. Select the Credit card or Bank transfer (ACH) or Bank transfer (ACH) toggle to turn on the options. 

However, if you are referring to something else, I hope you can send a screenshot so I'll be able to properly address your needs.

Moreover, QuickBooks has the latest transactions and puts them into QuickBooks. Learn how to categorize and how QuickBooks puts them on the correct line of your Schedule C. I've got this article for more details: Categorize Transactions In QuickBooks Self-Employed.

If you have any other concerns with the pay tab, let us know so we can get back to you as soon as possible.