Hello @mohamed2 ,
Unfortunately, @MirriamM 's post did not really address your question.
The way to enter an invoice with HST only is to enter two lines in the invoice. On the first line, use any Product/Service code and add the amount that will give you the amount of HST that you need. Use your HST tax code on that line. (i.e. you want to make an invoice for $500 worth of HST @ 13%; Enter a line for $3,846.16)
On the second line, enter the same pre-tax amount you entered on line 1, but as a negative number. Use a 0% Out of Scope tax rate on this line. The net effect is that you have $0.00 in pre-tax, but your invoice will have the amount of HST you want to see.
