I am a first time homebuyer and withdrew $7900 from my 403(b) to go towards costs related to the purchase of my home, would i place this amount under "other"

The 10% early distribution penalty exclusion for a first time home purchase is only when the distribution is from an IRA.

Using funds from the 403(b) are not an exception to the early withdrawal penalty.

And just to be clear, a 403(b) is not an IRA.