Because you can make contributions for tax year 2016 up until April 18, 2017, many banks will not issue the form 5498 until May. You will need two items of information to complete your tax return -- the amount of money that was contributed to the HSA by you or your employer via payroll deduction (which is on your W-2) and the amount of additional after tax contributions you made from your own funds (which you will get from your own financial records or from your HSA account history).
