This is super helpful - my income definitely fluctuates! How complicated is the calculation? Is there a simple formula I could use or do I need special software? I'm trying to avoid paying for a tax professional if possible.

The calculation isn't super simple, but it's doable without professional help. You basically track your income, deductions, and credits for each payment period, then calculate the tax on that amount as if it were your annual income (annualizing it). There's no single formula since it depends on your particular tax situation, but the IRS has worksheets in Publication 505 that walk you through it step by step. Most tax software can help with this too if you input your quarterly income data. I'd recommend at least trying the calculation once to see if it's manageable for you. The benefit is that if you earn most of your income later in the year, you won't have to make large estimated payments before you've actually earned the money.

Good point! I'm in Texas so I lucked out with no state income tax, but my friend in New York had the same issue as you. Do most states use the same payment deadlines as the federal ones?

8 MONTHS?? Ugh that's so much worse than I thought. Do you know if there's any way to check the status of an amended return after you submit it?

You can check the status of your amended return using the "Where's My Amended Return" tool on the IRS website. You'll need your SSN, date of birth, and zip code. The tool will tell you if it's been received, adjusted, or completed. But honestly don't expect updates very often - mine sat on "received" for about 6 months before changing to "adjusted". The key thing is to pay whatever additional tax you calculate when you submit the amendment. That way even if it takes forever to process, you won't be racking up additional penalties and interest.

This is good advice. I set up a payment plan too after I had to amend 3 years of returns. The interest rates aren't great but way better than credit card debt. And it keeps you from getting nasty letters from the IRS.

That's a huge relief! So just to be 100% clear - as long as I file by May 17, 2024, I'll get my full refund amount for tax year 2020 with no penalties at all? Even though I'm super late?

That's exactly right! If you're DUE a refund, the IRS doesn't penalize you for filing late. They only assess penalties and interest when you OWE them money. Just make sure you get it postmarked by May 17, 2024, and you'll receive your full refund amount. The only downside to filing late is that you've essentially given the government an interest-free loan of your refund money for the past few years.

I used FreeTaxUSA for my 2019 return last year when I was in a similar situation. They charge like $15 for state returns but federal is free. Their interface for prior years is identical to current years and super straightforward. Printed everything, mailed it in, and got my refund about 8 weeks later. Definitely recommend for older returns.

Thanks for mentioning this! You're right - there were actually a few extra pages that came with the K-1 that I ignored because they looked like gibberish to me. Just checked and they do have some explanations about the passive activity stuff. Would you recommend I still get professional help or is this something I can handle with tax software if I'm careful?

For a relatively simple K-1 showing only $3,800 in income, you can probably handle it with good tax software if you're careful. Since this is your first K-1, learning how to report it properly now will help you in future years. If the investment becomes more complex or involves much larger amounts, then professional help would be worthwhile. Just make sure you keep copies of all K-1s and supplemental information, as you'll need them if you ever sell your interest in the partnership to calculate your basis.

This is so important! I learned this the hard way too. Also worth noting that some states require estimated payments even if federal doesn't. My state has a much lower threshold for when you need to start making estimated payments.

Would you recommend mailing it certified so I have proof they received it? I've had stuff "lost" by the IRS before.

Absolutely use certified mail with return receipt. That gives you proof of when it was received and by whom. Keep a complete copy of everything you send (EVERYTHING) including the certified mail receipt. Also good practice to follow up by phone about 30 days after sending to confirm it's been received and assigned to someone. Ask for the status and document who you speak with. If you get nowhere with that call, wait 2 weeks and try again.

I did it in 2022 and got approved! The key is showing that you've been consistently treating the business as an S-corp in all your filings and operations. In my case I had filed corporate returns, taken reasonable salary, etc. They approved it retroactively even though I was like 18 months late with the election.