I would be careful about the 'no first year'.... I have an untaxed fellowship myself and was told repeatedly by my insititution to pay estimated taxes to both the state and feds, and had to sign something saying I was aware of my obligation to file quarterly. I have poured through the rules and the instances where the do and do not assess penalties depends on the intracacies of your filing-- how much, whether married, have you ever been required to make estimated taxes?
Ask a tax advisor because the penalty will exceed interest in an account if you are wrong.
Also-- the fact that you do not pay FICA is not necessarily true. A lot of post docs paid on NIH-granted lump sum fellowships have been required to pay fica according to the IRS as of 4/1/2005. It's a big mess and every university/institution is determining the rules differently, the issue being whether or not you are really in 'training'. The IRS thinks those in postdoc-like status are not.
http://www.irs.gov/individuals/students/article/0,,id=96674,00.htmlAlso-- reporting standards differ everywhere. At my current fellowship I get a 1099 in the mail, a W2 equivalent. At my previous instiution I got nothing, and nothing was reported, so I had to report it myself.
The point is that 'taking off the top' for supplies, computer etc.... is technically not allowed unless they are expenses that are necessary to obtain a higher degree by everyone enrolled in the program (qualified expenses).
Work-related expenses where you claim you spend stuff out of your own pocket (e.g. non qualifed educational expenses ) to further your training go under misc deductions, and you can only take them if they excede a certain % of your income.
Talk to a tax person and be aware that this is a soupy mess-- just know what you are doing so that you are not suprised nor do you alert the irs via ignorance of the rules.
Normally the income is just so small anyways that you can 'get away' with things, but you must have your rationale in place.
And remember, there is a difference between the tax code and those publications the IRS puts out. The code is what you have to follow, the pubs are the "correct" interpretation, but I know postdocs who have gotten refunds by following the letter of the code.
Save every single receipt. I have a big bucket I dump everything in because I never know next year what I will want to prove.