The indefinite article before "tax"

[Rachel Adams]

Can I use "tax" as a countable noun is my sentence correct?

"The amount of a tax depends on a salary."

 

[Rover_KE]

Can I use "tax" as a countable noun? Is my sentence correct?

I shouldn't have to be making corrections like this for you, Rachel.

The amount of tax you pay depends on your salary.

No more new threads today, please. You've already exceeded your daily allowance.

 

[Tdol]

Tax can be countable, but not in your example:

People say that inheritance tax is a tax on death. (One tax and different from income tax, capital gains tax, etc)