If your employer required you to move to MD, then you have no tax obligation to NE. You're not working in MD for your own convenience, but rather because your employer requires you to do so. Hence NE's "convenience of the employer" statute does not apply.
An employer who is not subject to the jurisdiction of MD is not required to withhold MD taxes, but they may do so voluntarily.
https://www.marylandtaxes.gov/forms/current_forms/Withholding_Guide.pdf
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
