Just had a client in, her DOB has been wrong on the tax return for 20 years....I've had 1955 as DOB, but its actually 1953...so she actually turned 65 in 2018 and will get a higher standard deduction.....does IRS just not care about DOB until they hit an age that it makes a difference?

If we hadn't caught the error this year, would IRS have automatically changed the return and given them a higher standard deduction?