If you are a US citizen or resident alien (i.e. green card holder), then, you are suppose to file taxes with the United States authorities, especially at the Federal level (IRS) even if you do not live in the United States. The United States (and Eritrea, only two countries in the World) taxes its citizens
If you are closing your business, you need to communicate to the tax authorities (Federal, State and local) which requires filing a final tax return, pay any liabilities to employees or vendors, pay any taxes outstanding, etc. Additionally, you need to keep the business records for a few years based on the period of limitations
In the IRS IR-2021-161, the IRS reminded that businesses, charities, and others with Employer Identification Numbers must update responsible party information within 60 days of any change. IRS regulations require EIN holders to update responsible party information within 60 days of any change by filing Form 8822-B, Change of Address or Responsible Party - Business.
