I received a lump pension payment in 2018, with 20% Federal taxes deducted off the top. I havent received a 1099 form yet. Can I still file my taxes?

[jlandersonjr]

I knowthe exact monetary amount that I received and the amount that I paid in Federal tax.

[dmertz · Accepted solution]

Without the Form 1099-R you won't be able to correctly enter all of the information beyond the dollar amounts.  Getting any part of it wrong is likely to delay your tax refund since the information is transmitted with your e-filing and must match the information that the payer provides to the IRS directly.  You should receive the Form 1099-R within the next few days.