One last note on form 4852
If you open the form on the IRS website it says you should attach it, so why wouldn't you? Again, I am a US resident reporting a foreign pension.
http://www.irs.gov/pub/irs-pdf/f4852.pdf
Substitute for Form W-2, Wage and Tax Statement, or Form
1099-R, Distributions From Pensions, Annuities, Retirement or
Profit-Sharing Plans, IRAs, Insurance Contracts, etc.
▶Attach to Form 1040, 1040A, 1040-EZ, or 1040X
Easy, lad, let's not fall out over this!
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As I said before, TurboTax has its own idiosyncracies. I realise you can not file TurboTax electronically without including 4852 and a sub 1099R, and TurboTax is designed primarily for electronic filing. I understand you have no choice.
In a past post, I mentioned American exceptionalism. That was the wrong term, and I should have said America centric (the 50 States). There are a number of issues in which the IRS publications, instructions, and forms are confusing if you have a foreign something. As for TurboTax, the NRA/SSN/ITIN fiasco is but one example.
Bearing in mind this US centric enviroment, my interpretation of the instructions for a sub W2 or 1099R relate to the fact that within the 50 States, all employers and pension funds are required to have a Fed ID number and are required to issue a W2 or 1099R. If they don't, the IRS will want to know why. I've recently learned that even Estates in probate should have an ITIN. The instructions state that the taxpayer should contact the provider first in order to recieve a replacement form before filing the 4852. This is obviously impossible with a foreign employer or fund. They don't have a US Fed ID number and don't file with the IRS (directly). I see the identifying of missing W2s and 1099Rs as more of a regulatory issue with the IRS for those with (or, without!) a Fed ID number, and the taxpayer is the one to alert the IRS of a failure to meet regulations. As with so many IRS instructions, they relate wholly (IMHO) to the US centric enviroment, and ignore completely the filer with a foreign something.
The taxpayer with a foreign something will include an amount somewhere on their 1040 or associated forms. This amount is no more or less verifiable by the IRS computers than the info on the 4852, nor is any tax paid and claimed as deducted.
You are correct, it doesn't cost anything to file the 4852 if you are so inclined. The IRS surely can not complain, and there is always the 'safety' aspect of having filed. As you can observe from other threads, the 'safety' aspect can spark disagreements. There are a few on this forum who still file by paper, and the form (IMHO) is not required. If someone has been notified by the IRS of a failure to file this form, I hope they will come forward.
As always, we are not professionals, and we both could be wrong. Welcome to the confusing world of the expat filer.