If you haven't put any money into an Individual Retirement Arrangement (IRA) for tax year 2000, or if you've put in less than the maximum allowed, you still have time, according to the IRS. You can contribute to either a traditional or Roth IRA until the April due date of your tax return.If you make a contribution for the previous tax year, tell the IRA trustee which year the contribution is for. Otherwise, the trustee may report the contribution as being for the year in which it was received.You may contribute up to $2,000 of your earnings each year to an IRA.