If the withdrawal occurred in 2018 then you should have received a Form 1099-R from the investment company for the withdrawal. The 1099-R is entered on your tax return as received on your 2018 tax return.
If the withdrawal occurred in 2019 then the investment company will send you a Form 1099-R in January of 2020 so you can report the withdrawal on your 2019 tax return.
IRS Form 1099-R - https://www.irs.gov/pub/irs-pdf/f1099r.pdf
To enter, edit or delete a form 1099-R -
- Click on Federal Taxes (Personal using Home and Business)
- Click on Wages and Income (Personal Income using Home and Business)
- Click on I'll choose what I work on (if shown)
- Scroll down to Retirement Plans and Social Security
- On IRA, 401(k), Pension Plan Withdrawals (1099-R), click the start or update button
Or enter 1099-r in the Search box located in the upper right of the program screen. Click on Jump to 1099-R