Desktop why are net 10 terms showing due in 8 days

Good day, @Proven1. 

One of the possible reasons that I can think of is the condition isn't set to the right number of days.

Let's check the settings of your net payment terms' Net due in days field. It will help us ensure it would work accordingly to the right number of days that it should be due. 

Here's how:

1. Go to the Lists menu, then select Customer & Vendor Profile Lists.
2. Choose Terms List.
3. Right-click Net 30, then select Edit terms.
4. In the Net due in days field, make sure to input 30.
5. Once confirmed, click OK.

After that, create an invoice to view the update.

You can also visit our help article for more information about this: Set up payment terms. 

Touch base with me here if you need any additional help. I look forward to assist you again.