Has anyone actually tried contacting the transfer agents directly? I had a similar issue last year and found out that most of these partnerships use one of just a few transfer agents (like Computershare or American Stock Transfer). Sometimes they can run a search by your SSN and tell you all the partnerships they service that issued you K-1s.

Another approach that helped me is checking your year-end account statements from ALL your brokerages. Many will include a special notice or footnote about "tax reporting delays due to K-1 processing" for any partnerships you held during the year. Also, don't forget about any closed positions - even if you only held a K-1 generating investment for a few days, you're still entitled to receive the form. I once got a K-1 for an MLP I held for literally 3 trading days in January 2022. One more tip: if you use TurboTax or similar software, they often have a "K-1 import" feature that can connect to major partnerships and pull your forms automatically. It's worth trying even if you think you have all your K-1s, as it might catch ones you missed. Good luck getting this sorted before your deadline!

Check if you claimed any credits like EIC or CTC. Those always take longer to process cause the IRS has to verify everything.

This happened to me too! Filed in January and state refund came in 10 days but federal took 4 months. Turns out I had a code 570 hold on my account for additional review. The key is definitely checking your transcript like others mentioned - it'll show you exactly what's happening. Don't panic though, as long as there's no notice about errors in your return, it's probably just routine verification. The wait is brutal but you'll get it eventually!

Quick tip: If you do decide to amend, make copies of EVERYTHING before sending it in. I had an amended return get "lost" by the IRS last year and had to resend the whole package. Also, if you mail it, use certified mail with tracking so you have proof it was delivered!

Just wanted to chime in as someone who went through this exact situation a couple years ago! I missed claiming about $400 in student loan interest and ended up amending to get back around $85. Here's my honest take: Yes, absolutely do it! Not just for the money (though $69 is definitely worth it), but also because it's great practice for understanding the tax system better. The amendment process taught me so much about how deductions actually work. One thing I'd add to the great advice already here - when you're filling out the 1040-X, the form asks you to explain the changes you're making. Be specific but concise. I wrote something like "Adding previously unreported student loan interest deduction of $381 per Form 1098-E" and attached a copy of my 1098-E form. Also, don't stress too much about making it perfect. The IRS will contact you if they need clarification on anything. Good luck with your first amendment - you've got this! 😊

Quick tip: make sure you create an account on irs.gov if you haven't already. Sometimes they post notices there before sending by mail

Code 810 can be frustrating but it's pretty common. The good news is it usually resolves itself once the IRS completes their review. In addition to checking for ID verification letters, also look out for any requests for additional documentation about your income or deductions. Keep checking your transcript weekly - you'll see the freeze lift when they update it with a new transaction code. Hang in there!

One additional thing to check - look at the tax year carefully. Sometimes people think the Letter 12C is for their current return when it's actually for a previous year. I made that mistake and sent in 2022 documents when they were asking about 2020, which caused even more delays.

Great advice from everyone here! Just wanted to add that if you're dealing with unemployment income like you mentioned, make sure you have your 1099-G form ready. The IRS often requests this for Letter 12C situations because unemployment compensation affects your adjusted gross income and tax liability. Also, since you mentioned getting all three stimulus payments, double-check that the amounts you reported on your return match what the IRS has on file. Sometimes there are discrepancies in their records about Economic Impact Payments that can trigger these verification requests. One more tip - if you claimed the Recovery Rebate Credit for any missing stimulus money, they'll definitely want documentation of what payments you actually received versus what you claimed. Keep records of any IRS letters you received about stimulus payments, as these can serve as supporting documentation. The 8+ month delay is unfortunately pretty common for these verification cases, but once you get them everything they need, it usually processes within 4-6 weeks. Hang in there!