I use One Stop Order Processing (OSOP) with me new Shopify store.
I am set up to collect vat in Settings:Taxes
All product variants have "Charge tax on this variant" checked
Orders show the correct vat amount being charged
When I export into OSOP, a second amount of VAT gets added on top. My settings there seems correct.
A products export from Shopify have the column labelled "Variant Tax Code" blank for all products (they are all variants). I guess this is where the problem is.
What should that column contain for standard rate vat of 20%?
Why is the column empty when the products are exported?
I thought I would update this in case anyone is interested.
This is the response from the great team at OSOP.
Thanks for the info. I have now found the issue and fixed OSOP. I will send a link to the new beta when available later this week.
The problem was that your "Tax" line in OSOP was called "GB Tax" so it assumed the VAT amount was 0 (as it did not expect GB) so added on the VAT. All VAT type text is now support in the new version."