None of your 457(b) contributions are deductible on your tax return. They are either pre-tax contributions excluded by your employer from the amount they report in box 1 of your W-2 or they are nondeductible contributions.
Your 457(b) contributions might qualify you for a Retirement Savings Contributions Credit depending on your circumstances. After you visit the section of TurboTax for this credit, TurboTax will automatically determine the credit.
I'm not sure what you mean by "we" pay into a 457 retirement account. A 457(b) account belongs to an individual employee. Each employee would have an account that receives contributions on behalf of only that employee.
