Update to remove grammar errors: On the other hand, the amount of the tax will go up as the productivity increases.
The first two sentences are correct.
The amount of the tax is increasing.
The amount of the tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax is increasing.
The tax
The amount of the tax is increasing.
The amount of the tax is increasing.
The amount of the tax is increasing.
The amount of the tax is increasing.
The amount of the tax is decreasing.
The amount of the tax is decreasing.
The amount of the tax is decreasing.
The amount of the tax is increasing.
The amount of the tax is decreasing.
The amount of the tax is increasing.
The amount of the tax is decreasing.
The