No, do not complete Form 4852. This is a substitute 1099 or W-2 when your employer or payer did not submit a statement when they should have. In the case of a pension from outside the US, there is no 1099 or W-2 to be had.
To enter foreign pension in TurboTax online program, you will you would NOT treat it as "other income," rather, you will create a mock form 1099-R.
Within your Personal Tax section, Under Retirement Plans, select the IRA, 401(k), Pension Plans (1099-R).
- On screen, Your 1099-R, answer Yes and select Continue
- Next screen, Choose your bank or brokerage, select I'll type it in myself
- On the screen Tell Us Which 1099-R You Have, check the box
I need to prepare a substitute 1099-R and follow the prompts.
If your foreign issue does not have an ID number, you can try entering nine 9s. If errors occur due to this entry, you can enter the pension under Miscellaneous Income. The following link provides the info for both entries:
https://ttlc.intuit.com/questions/3687929-where-to-enter-foreign-pension-income-and-foreign-tax-cred...
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