Employers aren't required to accept an employee's resignation if the employer has decided to terminate the employee.
Have you filed (are you planning to file) for unemployment?
Official Nebraska Department of Labor | Unemployment Insurance Benefits - File Online at NEworks.nebraska.gov
How can I apply for benefits?
Unemployment Insurance claims in Nebraska are filed online at NEworks.nebraska.gov. If you do not have internet access or have a disability requiring assistive technology, please visit your local Job Center for assistance. For a listing of Job Centers, click HERE. Click HERE for step-by-step filing instructions.
If you are filing a Nebraska unemployment claim from another state and do not live in a county bordering Nebraska, you must register for employment services in the state of your residence.
https://dol.nebraska.gov/webdocs/getfile/d9c15f48-1d09-4f82-9839-1ceaaa388159
NEworks
What information do I need when I apply?
Social Security Number
Complete home mailing address, including ZIP code
Telephone number
Email address
County you live in
Driver's license number or State ID card number
If you select direct deposit, your bank routing number and account number
The company names for all your employers from the past 18 months as they appear on your paycheck stubs or W-2 forms
Complete mailing addresses of employers, including ZIP code and the city in which the business is physically located
Your start and end dates with each employer, including month, day, and year
Your reason for leaving each employer (lack of work, voluntary quit, discharge, leave of absence)
Employment authorization number and expiration date (if a non-citizen)
If you served in the military the past 18 months, DD 214 Member #4 Form
If you worked for the federal government as a civilian employee in the last 18 months, Standard Form 8 or Standard Form 50. Also, compile your total wages earned with the federal employer in the last 18 months and indicate how you were paid (hourly, weekly, and monthly).
https://dol.nebraska.gov/webdocs/Resources/Items/Updated English Handbook for Unemployed Workers.pdf