You don't say how you filed previously. If you filed as self-employed in 2018, you might want to continue to show your business in 2019 unless you are sure you have closed everything out and will never reopen it. For instance, you might have taken deductions for equipment that depreciates over multiple years. Even if you took the whole deduction in the first year, that equipment still belongs to the business until it is disposed of. Because of things like this, it is generally best to keep filing once you start until you are sure you're done, and then to make sure you properly close everything out. Of course, these days if there is little money involved, you can guess that this will never be audited, so it's not something to lose sleep over! Remember the IRS is not about making sure everyone is a great accountant, but rather collecting money owed for taxes :-).
