This is actually a 4852 that you need to file. The best way to get there is to go to:
- tax tools (in the lower left hand corner of your screen)
- tools
- topic search
- Type in 4852 in the search bar
This should be filled out accurately as much as possible. Hopefully, you will have your year-end earnings reported on a paystub or other earnings statement. You will not be able to electronically file with a 4852 so you will need to print and mail your return. Turbo Tax will give you complete instructions regarding the filing and mailing instructions.