If i have a 1099-c and i dont file it this year, can i add it to next years return

[PaulaM]

No. Enter the 1099-C in the year it was received.

If you have already filed your return and it is accepted, then you will need to amend it to add the 1099-C form. However, wait until the original return is fully processed. If you had a refund/tax payment due wait until you get receive it or the payment is processed.

https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed