For 2020, if you were a full-year MD resident, and your capital gain was fully tax-exempt under federal law, and you had no other NJ-source income, then it is not necessary for you to file a non-resident NJ return.
With regard to the NJ "exit tax", if your home qualified for a full capital gain tax exemption under federal law, you should file NJ Forms GIT/REP-3 and A-3128 in order to have the "exit tax" refunded.
https://www.state.nj.us/treasury/taxation/pdf/other_forms/tgi-ee/gitrep3.pdf
https://www.state.nj.us/treasury/taxation/pdf/other_forms/tgi-ee/a3128.pdf
Unemployment compensation is fully taxable by MD.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
