Tax-advantaged retirement plans like IRAs allow your money to grow tax-deferred — or, in the case of Roth accounts, tax-free. The deadline for 2017 contributions is April 17, 2018.
Do you want to save more for retirement on a tax-favored basis? If so, and if you qualify, you can make a deductible traditional IRA contribution for the 2018 tax year between now and the tax filing deadline and claim the write-off on your 2018 return.