The computer glitch affects taxpayers whose income was below the filing threshold, but e-filed to receive their economic stimulus check. To allow people to e-file their returns, IRS let these people enter $1 for their adjusted gross income.

But, instead of factoring in that dollar as gross income, the Service’s system recorded it as a $2 earned income credit for the e-filers.

And in a rare show of generosity, IRS isn’t asking for the money to be repaid.