Can I just file a 1040-ES?
Yes, you can send in a 2012 1040-ES form with a check to cover your tax liability. However, you will likely have to pay penalties for not paying tax in timely fashion as well as interest on the late payment. You can have the IRS figure the penalty and bill you for it, or you can complete Form 2210 (on which these  matters are figured out) yourself and file it with your Form 1040. The long version of Form 2210 often results in the smallest extra amount due but is considerably more time-consuming to complete correctly. Alternatively, if you or your wife have one or more paychecks coming before the end of 2012, it might be possible to file a new W-4 form with the HR Department with a request to withhold additional amounts as Federal income tax. I say might because if the last paycheck of the year will be issued in just a few days' time, it might already have been sent for processing, and HR might tell you it is too late. But, depending on the take-home pay, it might be possible to have the entire $2000 withheld as additional income tax instead of sending in a 1040-ES. The advantage of doing it through withholding is that you are allowed to treat the entire withholding for 2012 as satisfying the timely filing requirements. So, no penalty for late payment even though you had a much bigger chunk withheld in December, and no interest due either.  If you do use this approach, remember that Form W-4 applies until it is replaced with another, and so  HR will continue to withhold the extra amount on your January paychecks as well.  So, file a new W-4 in January to get back to normal withholding. (Fix the extra exemption too so the problem does not recur in 2013).
It is true that with a job that pays you via payroll check that will result in a W-2 because you are an employee, the threshold that you are worried about before you have to file is in the thousands. Unless of course you make a lot of money from bank interest or you have income tax withheld and you want it refunded to you. Table 2 and table 3 in IRS pub 501, does a great job of telling you when you must.  For you table 3 is most likely to apply because you weren't an employee and you will not be getting a W-2. If any of the five conditions listed below applied to you for 2016, you must file a return. You owe any special taxes, including any of the following. a. Alternative minimum tax. (See Form 6251.)    b. Additional tax on a   qualified plan, including an individual retirement arrangement (IRA),   or other tax­favored account.  (See Pub. 590­A, Contributions to   Individual Retirement Arrangements (IRAs); Pub. 590­B, Distributions   from  Individual Retirement Arrangements (IRAs); and Pub. 969, Health   Savings Accounts and Other Tax­Favored Health  Plans.) But if you are   filing a return only because you owe this tax, you can file Form 5329   by itself.   c. Social security or Medicare tax on tips you didn't   report to your employer (see Pub. 531, Reporting Tip Income) or on    wages you received from an employer who didn't withhold these taxes   (see Form 8919).    d. Write­in taxes, including uncollected social   security, Medicare, or railroad retirement tax on tips you reported to   your  employer or on group­term life insurance and additional taxes on   health savings accounts. (See Pub. 531, Pub. 969,  and the Form 1040   instructions for line 62.)   e. Household employment taxes. But if you   are filing a return only because you owe these taxes, you can file    Schedule H (Form 1040) by itself. f. Recapture taxes. (See the Form   1040 instructions for lines 44, 60b, and 62.) You (or your spouse if filing jointly) received Archer MSA, Medicare Advantage MSA, or health savings account  distributions. You had net earnings from self­employment of at least $400. (See Schedule SE (Form 1040) and its instructions.) You had wages of $108.28 or more from a church or qualified church­controlled organization that is exempt from employer  social   security and Medicare taxes. (See Schedule SE (Form 1040) and its   instructions.) Advance payments of the premium tax credit were made for you, your spouse, or a dependent who enrolled in coverage  through the Health   Insurance Marketplace. You should have received Form(s) 1095­A showing   the amount of the advance  payments, if any. It appears that item 3: You had net earnings from self­employment of at least $400. (See Schedule SE (Form 1040) and its instructions.) would most likely apply. It obviously is not too late to file for 2016, because taxes aren't due for another month. As to previous years that would depend if you made money those years, and how much. "1. What forms do I need to file to receive money from Europe None. Your client can pay you via wire transfer. They need to know your name, address, account number, and the name of your bank, its SWIFT number and its associated address. The addresses and names are required to make sure there are no typos in the numbers. 2. What forms do I need to file to pay people in Latin America (or any country outside the US) None. 1099s only need to be filled out when the contractor has a US tax ID. Make sure they are contractors. If they work for you for more than 2 years, that can create a problem unless they incorporate because they might look like ""employees"" to the IRS in which case you need to be reporting their identitites to the IRS via a W-8BEN form. Generally speaking any foreign contractor you have for more than 2 years should incorporate in their own country and you bill that corporation to prevent employee status from occurring. 3. Can I deduct payments I made to contractors from other countries as company expense Of course." And if you need to pay business taxes outside of the regular US 1040 form, you can use the IRS' Electronic Federal Tax Payment System (EFTPS). Basically, you enroll your bank accounts, and you can make estimated, penalty, etc. payments. The site can be found here. "As a Canadian resident, the simple answer to your question is ""yes"" Having worked as a tax auditor and as a Certified Financial Planner, you are required to file an income tax return because you have taxable employment income. All the employer is doing is deducting it at source and remitting it on your behalf. That does not alleviate your need to file. In fact, if you don't file you will be subject to a no filing penalty. The one aspect you are missing is that taxpayers may be entitled to tax credits that may result in a refund to you depending on your personal situation (e.g spousal or minor dependents). I hope this helps." "IRS Pub 554 states (click to read full IRS doc):  ""Do not file a federal income tax return if you do not meet the filing requirements and are not due a refund. ... If you are a U.S. citizen or resident alien, you must file a return if your gross income for the year was at least the amount shown on the appropriate line in Table 1-1 below. "" You may not have wage income, but you will probably have interest, dividend, capital gains, or proceeds from sale of a house (and there is a special note that you must file in this case, even if you enjoy the exclusion for primary residence)" I don't think so in your case. Unless the account generates so much interest income that it became reportable (I don't know the exact limit, but I think it's in the hundreds if not thousands of dollars, you might get a 1099 form if it generates over $10 of interest income, but you don't have to file taxes if your overall income is too low anyways). The US does not typically tax assets, only income. There are some states (Florida is the only one I can think of) that has odd tax treatment of intangible assets, but I doubt that would apply in your case. If this were a large enough amount, usually over $10,000, it might trigger some reporting requirements (possibly by your home country). "You will be filing the exact same form you've been filing until now (I hope...) which is called form 1040. Attached to it, you'll add a ""Schedule C"" form and ""Schedule SE"" form. Keep in mind the potential effect of the tax and totalization treaties the US has with the UK which may affect your filings. I suggest you talk to a licensed EA/CPA who works with expats in the UK and is familiar with all the issues. There are several prominent offices you can find by Googling." "You can make estimated tax payments on Form 1040-ES.  Most people who make such payments need to do it quarterly because the typical reasons for making estimated payments is something like self-employment income that a person will get throughout the year.  If you have a one-time event like a single, large sale of stock, however, there's nothing wrong with doing it just one quarter out of the year. When it comes time to file your taxes, part of the calculate is whether you were timely quarter-by-quarter not just for the entire year, so if you do have a big ""one-time"" event mid-year, don't wait until the end of the year to file an estimated payment.  Of course, if the event is at the end of the year, then you can make it a 4th quarter estimated payment." You are correct that you do not need to file under a certain circumstances primarily related to income, but other items are taken into account such as filing status, whether the amount was earned or unearned income (interest, dividends, etc.) and a few other special situations which probably don't apply to you.  If you go through table 2 on page 3 and 4 of IRS publication 501 (attached), there is a worksheet to fill out that will give you the definitive answer.   As far as the 1099 goes, that is to be filed by the person who paid you.  How you were paid (i.e., cash, check, etc., makes no difference).  You don't have a filing requirement for that form in this case. https://www.irs.gov/pub/irs-pdf/p501.pdf "No, not on schedule C, better. Its an ""above the line"" deduction (line 29 on your 1040). Here's the turbo tax article on it. The instructions for this line set certain limitations that you must take into the account, and yes - it is limited to the net profit from the business. One of the following statements must be true. You were self-employed and had a net profit for the year. You were a partner with net earnings from self-employment. You used one of the optional methods to figure your net earnings from self-employment on Schedule SE. You received wages in 2011 from an S corporation in which you were a more-than-2% shareholder. Health insurance premiums paid or   reimbursed by the S corporation are shown as wages on Form W-2. The insurance plan must be established under your business. Your   personal services must have been a material income-producing factor in   the business. If you are filing Schedule C, C-EZ, or F, the policy can   be either in your name or in the name of the business." As littleadv says, if you're a sole proprietorship, you don't need to file a 1099 for money you pay yourself. You certainly will need to file a schedule C or schedule E to report the income. And don't forget SE to pay social security taxes on the income if you made a profit. If your company is a corporation, then -- I'm not a tax lawyer here, but I think the  corporation would need to file a 1099 for the money that the corporation pays to you. Assuming that the amount is above the threshold that requires a 1099. That's normally $600, but it's only $10 for royalties. "Regardless of the source of the software (though certainly good to know), there are practical limits to the IRS 1040EZ form.  This simplified tax form is not appropriate for use once you reach a certain level of income because it only allows for the ""standard"" deduction - no itemization.   The first year I passed that level, I was panicked because I thought I suddenly owed thousands.  Switching to 1040A (aka the short form) and using even the basic itemized deductions showed that the IRS owed me a refund instead. I don't know where that level is for tax year 2015 but as you approach $62k, the simplified form is less-and-less appropriate.  It would make sense, given some of the great information in the other answers, that the free offering is only for 1040EZ.  That's certainly been true for other ""free"" software in the past." You pay it this tax year.  Whether that's now due to W-2 withholding, or later with your 1040 next year, or with your 1040-ES all depends on your particular situation. I did not file taxes on last season winnings as I’ve received   conflicting advise (particularly regarding self-employment taxes). I   have all my documentation to support my winnings should I file as a   professional gambler. Oh dear. Get a GOOD tax adviser (licensed as EA, CPA or Attorney in Nevada) who's specializing in providing services to people like you and have it resolved ASAP. You're in major non-compliance. If you earned by gambling more than you earned by working in years, and you haven't reported that on your taxes - you may very well find yourself in jail. As to your original question - why on earth would you have a corporation for gambling? Or LLC... Why? What's the liability that you want to shield yourself of? It's your money that you're risking, and the risk is that you lose it, how is LLC or Corp going to help you in any way? Gambling winnings are reported as miscellaneous income (whether you're professional or just got lucky once with a slot machine - no matter), and if you're a pro (and it sounds like that since you're doing it systematically and in order to make profits), then yes, you pay SE taxes on it. Whoever told you anything else told you to break the law. Which you did, unfortunately. You need to fill out form 8606.  It's not taxable, but you still need to report it