Is that all states? That just sounds like VAT
I think this means that paying $10 would reduce your income tax by $3 (if income tax is 30%). This is different from getting a 100% credit ($10) which is what you'd get with a VAT system.
If for some reason you can't offset your input VAT, then you get the same deduction against your income as you would for a sales tax, because it's part of your expenses. BUT NOTE: that if the acquired good is depreciated, then in both cases (VAT or sales tax) the tax-related deduction is spread over several years rather than all at once.