Client has 1099-r income - annuity. No 1099-R. I know the gross received. I know part is non-taxable and that federal and state tax was withheld but I do not know the amounts.

Prudential never seems to send both the client's 1099-R's every year. Should I report the gross in the inut fiels and leave the other spaces blank and file, paying taxes on the whole amount for now.? Omit the entire amount (doesn't seem right)? File for an extension and have her pay the amount her return says is due?