Hello, good morning everyone,
I'm writing because I have the followiing error when I try to post an invoice:

I'm working with 2 lines, one is an item (with VAT calculation type Sales Tax) and the other is a GL account, with VAT calculation type: Full Tax.
This is US version. I tried this in W1 and had no trouble. I could work with both lines together.
How can I work in this version with both lines in the same document?
Thank you!