How do I tell the Canada Revenue Agency that they're sending someone else's documents to my address?
"Maybe just put all his correspondence back in the Post Box and mark it   ""Wrong address""? Precisely. Without opening. Just tell the postman that that person doesn't live there and have it returned to sender. The Revenue will figure it out. Most definitely do not accept any certified or registered mail not addressed to you personally."
Square is a company. They need to detail as part of their corporate taxes all of their expenses. The money they collected for you, and sent to you, is not income for themselves. Their tax form included the amount of money they sent you, along with either your Social Security Number of corporate tax id. The IRS computers match the information regarding expenses to the information regarding income. In this case the expense listed by Square didn't match-up with a line of your tax forms for that year. The IRS now sees that as unreported income. If you didn't tell them about other expenses you had, they can only assume your expenses were zero.  Congratulations you have a business. Unfortunately the Federal, state and local governments now will want to know about your business. You may have to fill out multiple years worth of tax forms and other required forms. Yes, you should getting professional accounting and tax help. "I'm mostly guessing based on existing documentation, and have no direct experience, so take this with a pinch of salt. My best understanding is that you need to file Form 843. The instructions for the form say that it can be used to request: A refund or abatement of a penalty or addition to tax due to    reasonable cause or other reason (other than erroneous written    advice provided by the IRS) allowed under the law. The ""reasonable cause"" here is a good-faith confusion about what Line 79 of the form was referring to. In Form 843, the IRC Section Code you should enter is 6654 (estimated tax). For more, see the IRC Section 6654 (note, however, that if you already received a CP14 notice from the IRS, you should cross-check that this section code is listed on the notice under the part that covers the estimated tax penalty). If your request is accepted, the IRS should issue you Notice 746, item 17 Penalty Removed: You can get more general information about the tax collection process, and how to challenge it, from the pages linked from Understanding your CP14 Notice" As I replied to someone else who said that:  I'm often having to send stuff with the check. Paperwork, a bill etc. While that would work to a person who knows me, it's usually not going to work with a business or government who needs to know why I'm sending this check. If you are going to be trying clever stuff with taxes in different place, you probably need a professional. Different countries definitely have different laws on the subject.  For example (several years ago) the UK considered you absent from the UK for tax purposes from the day you left, provided you were gone for a year, whereas Canada didn't charge you tax as long as you were not in the country for six months in the year. A carefully timed move enabled me to not pay tax at all for six months because I wasn't resident anywhere. Also it was irrelevant whether I intended to stay or not. "Money has to come from somewhere.  It can't just appear.  So if there is really an aunt at an agency, and she is sending checks, then she is writing checks from that company, and stealing from that company.  If that is the case, then the person with whom you are in contact would be using you to launder money (hide its illegal origin) and when the aunt was caught, you would be also. If it is really being done between countries, then it might be more difficult for them to find you, but it is still illegal. However, it is also likely that your contact may be using a common scam, as described by another answerer, that of asking for money in return for a cashier's check.  Although cashier's checks were designed to be ""safer"" than regular checks, in that they won't bounce, if it is a fake cashier's check, it was never worth anything in the first place.  When the bank tries to claim the cash from the other bank, and finds it doesn't exist, or there is no record of that check, then the effect is similar to that of a personal check bouncing: the bank will want the money back. If you have already given a portion of that money to your contact, chances are, when your find this out, he will be long gone.  I would not have anything further to do with this person. Good luck." Am I right to worry about both of these? Of course. Who carries $75K in cash for no good reason? Your friend got the cash from somewhere, didn't he? If its legit - there's paper trail to show. Same for your parents. If you/they can show the legit paper trail - there's nothing to worry about, the hassle, at worse, is a couple of letters to the IRS. If the money is not legit (your friend is selling crack to the kids in the hood and your parents robbed a 7/11 to give you the money, for example) - there may be problems. "Here's what's going to happen: At the last minute, he's going to ""discover"" that for some reason first you must send him $10,000.  He'll tell you not to worry, as he's still going to send you $40,000... now $50,000. In fact, he's going to tell you that he'll send you $60,000 and tell you to keep the $10,000 as a ""finders fee"". Then you will send him, $10,000 and he will walk away with your $10,000.  You'll never hear from him again. This is a very common scam. The best way to avoid it is not to tell him you won't do it for IRS reasons. The best thing to do is to stop accepting email from him and (optionally) report him to law enforcement." If they have a document that says they paid sales tax, then you must have a document that says you refunded it. Otherwise, your tax office might find out that you charged sales tax, you have no proof of the refund, so it very much looks like tax evasion. I'd call your tax office to hear what they say about it. I can ONLY WISH this would happen to me.  Get every scrap of information that you can. DOCUMENT DOCUMENT DOCUMENT..and then get a nice sleazy lawyer to sue the collector AND your employer if they leaked anything... Plain and simple,  it's illegal and there are very nice protections in place for such. "What they are doing is wrong. The IRS and the state might not be happy with what they are doing.  One thing you can ask for them to do is to give you a credit card for business and travel expenses. You will still have to submit receipts for expenses, but it will also make it clear to the IRS that these checks are not income. Keep the pay stubs for the year, or the pdf files if they don't give you a physical stub. Pay attention to the YTD numbers on each stub to make sure they aren't sneaking in the expenses as income. If they continue to do this, ask about ownership of the items purchased, since you will be paying the tax shouldn't you own it?  You can in the future tell them ""I was going to buy X like the customer wanted, but I just bought a new washer at home and their wasn't enough room on the credit card. Maybe next month""" Note: I am not a lawyer. This is my personal opinion and interpretation. First, your source is European Law, which obviously doesn't apply outside of the EU. The EU cannot make laws that bind entities in other countries; so you cannot claim that the VAT was needed to be mentioned. Second, if you owe something, you owe it; it doesn't matter if it was forgotten to be mentioned. At best, you can say that under those circumstances you don't want the software anymore, and i would assume you can send it back and get your money back (minus a fee for having it used for a while...) - this gets quite difficult to calculate clearly, so it's probably not a good avenue to follow for you. As the company has to send the VAT to your country (they will not be allowed to keep a dime of it, and have to bear the complete cost for the handling), it is a debt you have to your government; they are just the entity responsible for collecting it. Still, if you just ignore them, they will probably suck it up, and your government will also not do a thing to you. If they only have your email address, they have no way of knowing if you even still have/use this address; for all they know, it could be you never got it. They also cannot simply charge your card, as they probably don't have the card data any more (they are not supposed to keep it after the transaction is complete, and they thought it was complete at the time). All in all, you should be safe to ignore it. It's between you and your god/consciousness, if you feel obliged to pay it, as technically you owe it. No, always give the most current address information to the IRS, not least because they will use this address to send you important communications, such as refund checks or notices of deficiency. Per the 1040 Instructions, you should put in your address, with no mention of past addresses.  Moreover, if you will change addresses after filing, the IRS has provided Form 8822 to notify them of the new address.  There is a similar Form 8822-B for business addresses. They will use your Social Security Number (SSN), Individual Taxpayer Identification Number (ITIN), or Employer Identification Number (EIN) to track who you are.  There's no point to purposely giving an invalid address, and in fact it's technically illegal since you will sign and certify the return as true and accurate to the best of your knowledge. "This is fairly simple, actually.  You should insist on payment for the rent payment you never received and stop accepting cash payments. If you want to be nice, and believe the story, allow the tenant additional time or payment in installments for the missing $750, but this is a textbook example of why it's a bad idea to transact with cash.  Insist on cash equivalents that are traceable and verifiable - check, money order or cashier's check, made out to you or your company name. Also, for what it's worth, you are not out $750, unless you choose to be.  Your tenant is.  ""I put cash in your mailbox"" is not proof of payment, and doesn't fly as payment anywhere.  If it did, I'd never pay any of my bills." "In your mother's position, I would do two things: Get a copy of her credit report. Money Advice Service has a useful page on how to do this - it is cheap (£2) or free to do and will immediately tell you if someone else is using her address for anything untoward. Check with the Post Office whether anyone has set up a redirect on mail to your Mum's address. You can redirect by individual names, so if Joe Bloggs buys a bunch of stuff and has it sent to him at your Mum's address, he could set up a redirect at the Post Office so any post for Joe Bloggs at that address gets redirected to Joe Blogg's real address. There is a page about this on the Post Office website, I don't know exactly how to check if someone else has set this up but I'm sure the Post Office would help you find out. Additionally, I would consider visiting the address (the same house number in the ""Road"" where hers is in the ""Avenue"") and see whether the occupants have anything useful to say about this. I would just say you'd had some mis-delivered post, and want to check what their names are so that you can pass on anything that is intended for them that comes to your address (and ask them to do likewise for you). Depending on how that goes you could also ask about the ebay store and see whether it really is them that set it up." "There is no doubt that this is a scam (you ask a British solicitor for help with this sort of problem, not an American friend) but it's not as obvious as some answers seem to assume. Inheritance taxes always have to be paid before legacies can be received, and the funds are part of the estate not ""in the hands of the government"". There are certainly ways round the problem (which vary by country), but if the facts were as the asker sets out, this would be a reasonable request. You can bet they aren't and it isn't."