Calculate a tax by taking the amount of the line plus the tax VAT

VAT = 7%

TIMBRE= .25%

1- Line amount invoice = 100

2- VAT => 100*7% =7

3- TIMBRE=> Line 1 (100) + line 2 (7) * .25% = 0.2675

Can you help me how should you set these two rates to have this calculation as the example above ?, attached screens how you currently calculate it.

Thanks