State tax issues for NJ resident with DC tax withheld, and likely refunded
If you already filed the DC return, you can try and wait with filing the NJ return until you get the answer from DC.  You can file an extension request with the NJ division of taxation here. Or, you can file without claiming the credit, and worst case amend later and claim it if DC refuse to refund. I find it highly unlikely that DC will decide that a person staying for a couple of months over the year in hotels will count as a resident.
I was only able to find Maryland form 1 to fit your question, so I'll assume you're referring to this form. Note the requirement: Generally all tangible personal property owned, leased, consigned or   used by the business and located within the State of Maryland on   January 1, 201 must be reported. Software license (whether time limited or not, i.e.: what you consider as rental vs purchase) is not tangible property, same goes to the license for the course materials. Note, with digital media - you don't own the content, you merely paid for the license to use it. Design books may be reportable as personal tangible property, and from your list that's the only thing I think should be reported. However, having never stepped a foot in Maryland and having never seen (or even heard of) this ridiculous form before, I'd suggest you verify my humble opinion with a tax adviser (EA/CPA) licensed in the State of Maryland to confirm my understanding of this form. Many states have a simple method for assessing income tax on nonresidents.  If you have $X income in State A where you claim nonresident status and  $Y income overall, then you owe State A a fraction (X/Y) of the income  tax that would have been due on $Y income had you been a resident of State A.  In other words, compute the state income tax on $Y as per State A rules, and send us (X/Y) of that amount.  If you are a resident of State B, then State B  will tax you on $Y but give you some credit for taxes paid to State A. Thus, you might be required to file a State A income tax return regardless of how small $X is.  As a practical matter, many commercial real-estate  investments are set up as limited partnerships in which most of the annual taxable income is a small amount of portfolio income (usually interest income that you report on Schedule B of Form 1040), and the annual  bottom line is lots of passive losses which the limited partners report (but do not get to deduct) on the Federal return.  As a result, State A is unlikely to come after you for the tax on, say, $100 of interest income each year because it will cost them more to go after you than they will  recover from you. But, when the real estate is sold, there will (hopefully) be a big capital gain, most of which  will be sheltered from Federal tax since the passive losses finally get  to be deducted.  At this point, State A is not only owed a lot of money (it knows nothing of your passive losses etc) but, after it processes the income tax return that you filed for that year, it will likely demand that you file income tax returns for previous years as well. You should consult a US CPA to ensure your situation is handled correctly.  It appears, the money is Israel source income and not US source income regardless if you receive it while living in the U.S. If you file the correct form, I suspect the form is 1040NR and your state form to disclose your income, if any, in 2015 and 2016, it should not be a problem. Having said that, if you do earn any type of income while in the U.S. , you are required to disclose it to both the IRS and state. The IRS can direct your refund towards repayment of your unpaid taxes either on Federal or State/Local level. Whether it will depends on whether the State of New York will ask for it. Generally, if you owe taxes to New York for this year only, you would expect them to wait for you to file your State tax return and pay the taxes owed. If you don't - I'm pretty sure that the next year refund from the IRS will go directly to them. As a resident of New York State you will, in addition to the Federal income tax handled by the IRS, be responsible for state and local income taxes. For New York the state tax forms are also used to determine your New York city tax. If HR was either not aware of the local tax requirement for New York or you filled out the New York State version of the W-4 incorrectly you may have had too little tax withheld for New York state. The refund from the IRS is not dependent on the refund/owe status for state and local taxes. It is possible that your state taxes are fine but that you owe taxes to the city. That tax you owe to the city will reduce the refund from the state and may require you to pay money to New York. Of course if you do itemize, what you pay to the state and city may result in deductions on your federal form. If you owe back taxes to the state or local government this could result in the IRS seizing a federal refund, but that doesn't happen right away. "New York will want to you to pay taxes on income from ""New York sources"". I'm not sure what this means to a freelance web developer.  If your wife is doing freelance web development under the same business entity as she did in New York (ie. a New York sole proprietor, corporation, etc), you probably do need to file. From nonresident tax form manual: http://tax.ny.gov/pdf/2011/inc/it203i_2011.pdf If you were a nonresident of New York State, you are subject to New   York State tax on income you received from New York State sources in   2011. If you were a resident of New York State for only part of 2011, you are subject to New York State tax on all income you received while   you were a resident of the state and on income you received from New   York State sources while  you were a nonresident.  To compute the amount of tax due, use Form IT-203, Nonresident and   Part-Year Resident Income Tax Return. You will compute a base tax as   if you were a full-year  resident, then determine the percentage of   your income that is subject to New York State tax and the amount of   tax apportioned to New York State." "Sales tax and luxury tax is what you will have to pay tax wise, and they are non-refundable (in most cases but the rules vary area to area).  This really tripped up some friends of mine I had come from England.  The rules are complicated and regional.  Sales tax is anywhere from 0% to 10.25% and are not usually applied to raw foods.  Luxury taxes are usually state level and only apply to things most people consider a large purchase. Jewelry, cars, houses, etc. Not things your likely to buy. (Small, ""normal"" jewelry usually doesn't count. Diamond covered flava-flav clock ... probably has a luxury tax.) For sales tax, it can change a lot. Don't be afraid to ask. People ask all the time. It's normal. I personally add 10% to what I buy. Sales tax in my city is 7%, county is 6.5%, state is 6%. So you can get different rates depending on what side of the street you shop on some times.  Under normal circumstances you do not get a refund on these taxes. Some states do give refunds. Usually however the trouble of getting that refund isn't worth it unless making a large purchase.  You are not exempt from paying sales tax. (Depending on where you go you may get asked). Business are exempt if they are purchasing things to re-sell. Only the end customer pays sales tax.  Depending on where you go, online purchases may not be subject to sales tax. Though they might. That, again, depends on city, county, and state laws. Normally, you will have to pay sales tax at the register. It will be calculated into your total, and show as a line item on your receipt. http://3.bp.blogspot.com/-yAvAm2BQ3xs/TudY-lfLDzI/AAAAAAAAAGs/gYG8wJeaohw/s1600/great%2Boutdoors%2Breceipt%2BQR-%2Bbefore%2Band%2Bafter.jpg Also some products have other non-refundable taxes. Rental car taxes, fuel taxes and road taxes are all likely taxes you will have to pay.  Areas that have a lot of tourists, usually (but not always) have more of these kinds of taxes.  Friendly note. DON'T BUY DVDs HERE! They won't work when you get home. I know you didn't ask but this catches a lot of people. Same for electronics (in many cases, specially optical drives and wireless)." For purposes of the EIN the address is largely inconsequential. The IRS cannot (read: won't) recover the EIN if you fail to write it down after the website generates it for you. On your actual tax form the address is more consequential, and this is more so a question of consistency than anything. But an entity can purchase property anywhere and have a different address subsequent years. Paying the actual taxes means more than the semantical inconsistencies. The whole purpose of separate accounts is to make an audit easier, so even if someone imagines that some action (such as address ambiguity) automatically triggers an audit, all your earnings/purchases are not intermingled with personal stuff, which just streamlines the audit process. Consequences (or lack thereof) aside, physical means where physical property is. So if you have an actual mailing address in your state, you should go with that. Obviously, this depends on what arrangement you have with your registered agent, if all addresses are in Wyoming then use the Wyoming address and let the Registered Agent forward all your mail to you. Don't forget your $50 annual report in Wyoming ;) How did you open a business paypal without an EIN? Business bank accounts? Hm... this is for liability purposes... Should I have a W-2 re-issued? A W-2 can be corrected and a new copy will be filed with the IRS if your employer incorrectly reported your income and withholding on a W-2 that they issued. In this case, though the employer didn't withhold those taxes, they should not reissue the W-2 unless they plan to pay your portion of the payroll taxes that were not withheld. (If they paid your share of the taxes, that would increase your gross income.) Who pays for the FICA I should have paid last year? Both you and your employer owe 7.65% each for FICA taxes. By law your employer is required to pay their half and you are required to pay your half. Both you and your employer owe additional taxes because of this mistake. Your other questions assume that your employer will pay your portion of the taxes withheld. You employer could decide to do that, but this also assumes that it was your employer's fault that the mistakes were made. If you transitioned to resident alien but did not inform your employer, how is that your employer's fault? According to this section in Publication 15:  Collecting underwithheld taxes from employees.   If you withheld no   income, social security, or Medicare taxes or less than the correct   amount from an employee's wages, you can make it up from later pay to   that employee. But you’re the one who owes the underpayment.   Reimbursement is a matter for settlement between you and the employee.   [...] it seems that if the employer withheld less than the correct amount of FICA taxes from you, it is still the employer who owes your FICA taxes to the government, not you. I do not believe there is a way for you, an employee (not self-employed), to directly pay FICA taxes to the government without going through the employer. The employer can deduct the underwithheld amount from you future paychecks (assuming you still work for them), or settle it with you in some other way. In other words, you owe the employer, and the employer owes the government, but you do not directly owe the government. If they do deduct it from your future pay, then they can issue a corrected W-2, to reflect the amount deducted from you. But they cannot issue a corrected W-2 that says FICA were deducted from you if it wasn't. To bring more clarity to the issue, Viriato will be entitle to deduct property tax depending upon whether he is claiming standard deduction (which varies on some factors including filling as married or single) or itemized deduction. If he is claiming, itemized deduction Example 1 is correct. Example 2 suffers from another mistake. He can get refund of only income tax portion of $5000 and not $5000. "&gt; Seven U.S. states currently don't have an income tax: Alaska, Florida, Nevada, South Dakota, Texas, Washington and Wyoming.   So to be clear, you were talking about just income tax in your original comment? Or do those states have no other forms of tax whatsoever? I am still confused because you just said ""state tax"" in your original comment and did not specify a specific type of taxation like ""income tax"" or ""property tax"" or ""business tax"" or ""sales tax"" within the state." There's nothing wrong with your reasoning except that you expect the tax laws to make perfect sense. More often than not they don't. I suggest getting in touch with a professional tax preparer (preferably with a CPA or EA designation), who will be able to understand the issue, including the relevant portions of the French-US tax treaty, and explain it to you. You will probably also need to do some reporting in France, so get a professional advice from a French tax professional as well. So, in my tax return, can I say that I had no US revenue at all during   this whole year? I doubt it. "Look at how much tax you paid last year, including withholding and any additional amount that might have been due with the tax return. Look at the instructions for the W-4 form, which sets how much tax you want your employer to withhold. Adjust the numbers on that form until the total withheld during the year is close to what you expect this year's total to be -- remember, though, that there's no penalty for over-withholding but could be for under-withholding. Submit the W-4 form to your employer.  Remember that we're a few weeks into the year, so even if you adjust withholding now there will have been several paychecks at the prior setting; you can try to build that into your guesstimate of how to reset the withholding, or just not worry about it. Do the same with your state's withholding adjustments form. Repeat on a yearly basis, to account for raises, changes in other income, changes in filing status, etc. until it's close enough that you're satisfied with it. Then reconsider if/when your financial situation changes. Personally I find that exercise more effort than it's worth, and have simply set my withholding at ""close enough"". I usually get some money back from the feds and owe some to the state, but either is handled happily by my normal bank account balance." Welcome to the working world.  I will answer these a bit out of order. C)  Your withholding has almost zero chance of being correct.  Just about everyone has to pay or gets a refund.  I typically shoot for +- of $1000, and that is tough. A)  Your W-2 is where you adjust the amount of tax that is withheld.  You should fill out a new one as soon as possible.  You can use a paycheck calculator to figure out the proper tax that should be withheld.   B) No. D)  Yes you will owe Utah state tax.  See this site. The rub of this all is that you may have to pay Idaho tax prior to being refunded your Federal.  If you want to avoid this file your federal return as soon as possible (Goal:  File by 7 Feb).  You should have the return in 3 weeks or less (presuming you are owed one).  That will give you plenty of time to file and pay any Idaho tax owed.   I say all of this because you may be tempted to go to a tax preparation shop and take an advance on your income tax return.  Those loans are for people that hate money and are designed to tempt the foolish.  They are only slightly better than payday loans.