If you entered any assets this year and took the 179 deduction OR has any assets being depreciated from a prior year return then you do need the form so you will need to wait.
Do you have a business from a prior year? to remove those assets from your return you must close any old business as the IRS assumes you are still open until you dispose of all assets...
It must be from a previous year, then. I'll look back and see how I entered in everything for the last year or so. Thank you.
Close your old business are marked the Schedule C as "Final".
Click on Business Income and Expenses (I'll Choose What to Work On)
Start/Update - Profit or Loss from Business
Three or four screens in is "Tell us about your business"
Check the Box "I sold (or disposed of) my business in 2017 and you will have to say how your assets were sold or disposed of.