Can you claim post tax on your taxes?

I guess it depends;for instance, the traditional IRA is a retirement savings plan where contributions may be tax deductible and the values can grow tax deferred until withdrawal at retirement.However, for 2010, the IRA contribution limit for any wage earner is $5,000 or the individual's taxable wages, whichever is less. A wage earner over the age of 50 can contribute an additional $1,000 into an IRA. In the case of R-IRA, Roth IRA contributions are not tax deductible by definition. The tax benefit from a Roth IRA is taken at retirement when distributions are tax-free.