I supplement my social security income with freelance writing. I file a schedule C. I have no income in 2018 but I will in 2019. Can I skip the schedule C for one year?

I spent all of 2018 on a book project, for which I got an advance in 2017. The book will be published in 2019. I'm just wondering if it will look fishy to the IRS if I skip filing for my freelance business for one year, or if I should go ahead and do the schedule C to list my very few business expenses.