Originally Posted by gar1976

PA for W-2. Non-resident form (depends, see below).
IF DC has a tax, I'd put the entire 1099 amount for there if you feel like being legal. If not, just claim it in your home state.
If your state of residence is still NJ, I'd file a NJ return with no taxable income (except interest and dividends) allocated there. Possibly the 1099 income, if you don't want to file a DC return.

Keep in mind, I work in OR, not that familiar with east coast taxes. This is a SWAG. If it was me, I'd file PA for the W-2 and stuff the rest into my resident state because who wants to hassle mith mutli-state returns?