I just noticed that OP said that s/he maxed the traditional IRA and then has $500 in a Roth.
I should point out for clarity that one can only contribute $5,500 (more if you're over 50) per tax year total between both the Roth and the traditional IRA, and you can only recharacterize contributions for the current tax year(s).
So I'm not sure of the actual situation, but:
1. If the OP contributed $5,000 or less to the traditional and $500 to the Roth for 2017, s/he can still recharacterize the $500 from Roth to the traditional. I recommend submitting amended tax returns to federal and state to show the additional $500 deduction and saving maybe $50-$100 in taxes, more if the OP qualifies for the Retirement Savings Tax Credit.
2. If the OP contributed more than $5000 to the traditional and the $500 to the Roth for 2017, s/he has overcontributed and will owe a 6% penalty on the excess each year the excess remains in the IRA(s). S/he should remove anything over $5,500 ASAP. This is unlikely since it sounds like both the IRAs are at Vanguard, and they keep track of the contribution limits for you.
3. If the $500 in the Roth was contributed for tax year 2016 or earlier, it can no longer be recharacterized. It could be withdrawn, as Rob_bob notes, but any gains would either need to be left in the account (which sounds like it might be very small), or if withdrawn would face both income taxes and a 10% penalty for early withdrawal.
OP, how much did you actually contribute to your IRAs and for which tax years did you make the contribution(s)?