At tax time, many Americans think, often fleetingly, about spending less and socking away more for retirement. Until April 15, the IRS permits people who do not have a pension plan at work to deduct up to $6,000 for money placed in an IRA; taxpayers who do have an employer pension can also receive the IRA deduction if their earnings fall under the IRS’ income limits. The tough question that trips people up is: How much will I need? The easy way to think about this is in terms of the income necessary to maintain your current standard of living after the paychecks stop coming in. Click here for a tool that estimates both how much you’ll need and how…