Entering Sales Invoices Since the last automatic QB update the tick box for"amts inc VAT"is ticking its self so think entering NET but QBs is doing GROSS Can I default it

So Business Partner is aware of the issue but when working late it seems to lapse back (on quotes & invoices) so we are loosing money. 

I'm not in the office all the time so me doing the invoicing isn't an option either. 

Is there an option to make it so all prices or data entry is a NET value and not a Gross figure. 

Some of our clients are very understanding and have paid the difference but some we have lost money on. 

TIA