you don't need to mail it to the IRS or do anything with it. The IRS eliminated the requirement to file a copy of the section 83b election with the tax return for 2016 tax year and going forward. You can e-file your return as normal. The IRS no longer needs a copy of the 83(b) election to be included with the tax return. Just keep it with your own, personal records.
The amount is reported already within your w-2.
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