Hal_AlAnswer
Level 15
June 3, 2019
No, you cannot wait until next year. You will have to file an amended 2017 return. You cannot file an amended return yet. You must wait for your original return to be fully processed (you get your refund).
How to amend https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed
A 1099-C is usually taxable. There are a few exceptions. For a full discussion, see https://ttlc.intuit.com/questions/4055947-1099c-cancellation-debt-bankruptcy