Per the IRS website Closing a Business Checklist:
There are typical actions that are taken when closing a business. You must file an annual return for the year you go out of business. If you have employees, you must file the final employment tax returns, in addition to making final federal tax deposits of these taxes.
The annual tax return for a partnership, corporation, S corporation, limited liability company or trust includes check boxes near the top front page just below the entity information. For the tax year in which your business ceases to exist, check the box that indicates this tax return is a final return. If there are Schedule K-1s, repeat the same procedure on the Schedule K-1.
You will also need to file returns to report disposing of business property, reporting the exchange of like-kind property, and/or changing the form of your business.
Note: Form 1040 Schedules C, E, and F do not have check boxes to indicate a Final Return.
Refer to the link above for additional information.