Understanding 'Tax Transactions'

Hi, I am new to using this program and have set up my tax codes (mainly GST). The tax amounts display correctly on the invoices ($9.09 GST on a $100 Inv) but in the tax transaction report they are displaying as 10% of the total sale…ie $10 (tax on sales) on a $100 total sale?

I’m not sure if I have done something incorrectly. Any help would be appreciated.

Manager enables entry of values tax inclusive or tax exclusive.
Change that check box on the invoice an see if it then behaves as you expect.
Tax Codes: Choose between tax-exclusive and tax-inclusive prices