First Time Home Buyer Credit was back in 2007 or 2008.  At one point it was a loan to be paid back, then the next year it was free money, but there hasnt been another federal one since then.

I dont know anything about DC returns (is there such a thing?)

Here is a link to see if it is still available. https://otr.cfo.dc.gov/page/other-credits-and-deductions