If your income is approximately the same as last year then your total gross income with the additional $70,000 from the IRA would be $230,505 and the federal income tax attributable to the $70,000 would be about $19,600 (28%). The distribution will also be subject to CA taxes (maximum of 9.3% tax rate) assuming you are a CA resident.
However, if you previously made any nondeductible IRA contributions then a portion of the withdrawal will be tax-free.
By tax-free withdrawals I mean that if you have ever made any nondeductible IRA contributions in previous years, then these amounts can be withdrawn tax-free because you already paid taxes on the contributions. If you had made these types of contributions, then you should have filed Form 8606 in the years that you made the contributions.