When you convert a Cash VAT company. You will have to manually change the open invoices to include VAT. Make sure you first enable taxes in your company.
1. Open the invoice
Please note you only have to do this for open invoices. Because the initial information should come from your Sage50 VAT report.
2.Change the VAT line
Now we have to change the Sage VAT line to include taxes. Toggle "Amounts" are to "Exclusive of Tax" and pick the right tax rate next to the sales line. After you have changed all the lines, and the cumulative VAT amount is what you expect, you can remove the Sage VAT line.
3. Save the invoice
Save the invoice now including tax.
This makes sure the VAT actually shows up when you do your first VAT report in Quickbooks Online. You can still follow the rest of our tax steps.