<prompt> Human: i was doing my yearly backdoor roth IRA conversion from 5500 today and noticed there was a balance of 0.28 in my vanguard traditional IRA after i made the conversion. It said it had converted -5499.72 from the traditional to the roth IRA. I had put in to convert the 0.28 balance over to the roth IRA and now it appears that I have now contributed 5500.28 to my roth IRA for the year which is going to cause issues when filing taxes.Two questions, what was this 0.28 from? The funds were transferred from my brokerage account to traditional IRA yesterday and I converted to the roth IRA as soon as I possibly could today so im not sure where that extra money came from.What should I do about the 0.28 from my roth IRA? Should I just leave it there and fill out the extra tax forms? Withdraw 0.28 and take the penalty? Is this reversible generally? Should I convert back to traditional IRA and then withdraw there? Would love any advice.  <response>: Well, there is a Withdrawal of Excess Contribution process. Most brokerages have forms for that, some you even can do it online.But, its also 28 cents. And IRS allows you to round to whole dollars. Most online tax software forces you to round to round even if you type in the cents. 0.28 rounds to ZERO. So Im thinking youre fine. But if you want to be really picky...Excess contributions can be applied the next year as part of the next years contribution, but you still owe the 6 excess contribution tax for each year the excess is in the account. So worst case, next year contribute only 5499.72, because you already contributed 0.28. Do have TurboTax or HR online or TaxAct do the excess contribution form and carryover to next year, when you file your taxes. Be a good citizen and pay the 6 penalty for one year on your 0.28 violation!Which is 1.68 cents. Which rounds to 2 cents. Which whole-dollar rounds to zero. Not an accountant, not a tax person, not a lawyer, just an internet rando. But I would guess youre fine. 