Adobe Stock Revenu Taxes

Sales taxes (VAT) are for the end consumer. So, if the end consumer is located in a country that has sales taxes, sales taxes are paid according to the local rules. Intermediaries don't pay or require sales taxes. Furthermore, consider Adobe stock to be an extra-EU company, at least for what you contribute to Adobe stock. Remember, you need to fill out a US IRS required tax form, so you can well assume that you are dealing with an American company.

This differs, however, with your earnings. According to the commonly agreed doctrine, you need to pay taxes somewhere. Normally, you are taxable in the country where you live (or the other way around!). Sometimes, and depending on contracts between states, you may be taxable in the country where you earn your money. Because the type of earnings you realize is part of a treaty between the USA and France, and in that treaty it is stated that you need to pay taxes in your country of residence, the other country exempts your earning from taxes in that country. It's complicated, and it's different from country to country.

If you are unsure about how to proceed, you absolutely need to ask your tax consultant because anything that we may or may not affirm here is like hot air… This is not the place to ask tax questions of any kind.

I am not a tax expert. 

Based on the Tax Treaty between France and the United States, your withholding rate to the IRS is 0%. 

However, you are responsible for paying on your own whatever taxes are owed to France.

https://helpx.adobe.com/in/stock/contributor/help/withholding-rates-country.html

https://helpx.adobe.com/in/stock/contributor/help/Taxes-non-US-citizens.html

As far as I know, Adobe sends a tax statement (INT99) once a year. On the statement you should see if taxes were withheld.