Hello there, @Jennivdm.

You can create an invoice in Company A, then record it as bill in Company B. I can guide you on how to do it.

First, let's make sure to add Company B as a customer in Company A. Here's how:

1. Go to the Sales menu.
2. Choose the Customer tab.
3. Select the New Customer button.
4. Enter the details of Company B in the Customer Information window. 
5. Click the Save button. 

Now, you can create an invoice.  

On the other hand, you can enter Company A as vendor in Company B. You can follow these steps:

1. Choose the Expenses menu.
2. Select the Vendors tab.
3. Click the New Vendor button.
4. Enter the details of Company A in the Vendor Information window. 
5. Click the Save button. 

Now, you can create a bill to record the invoice you'd receive from Company A.

You can create a journal entry to record the invoice payments in Company A and bill payments in Company B. Lastly, I'd recommend consulting with an accountant so you'd be guided accurately in tracking your VAT-related transactions.

Get back to us here if you have other questions or concerns. I'm always here to help.