How can I claim tax back from whilst I was working in Austria?
I don't have any specific situation on the situation in Austria, but in general there are a few things that you should keep in mind. First of all, the official website of the Austrian tax authorities appears to be this one: https://www.bmf.gv.at/steuern/startseite-steuern.html. There is an English page there, but it is mainly aimed at international businesses. The part about tax treaties may be relevant, though. The general procedure is outlined here: https://www.bmf.gv.at/steuern/startseite-steuern.html. Like I said in my comment, most information is likely only available in German. I would strongly advise to ask help from someone who speaks German and is familiar with the tax system in Austria. The main thing that you would have to do first is to check of which country you are a resident for tax purposes. This is usually the country in which you lived for more than 183 days in the past year. If you moved during the year, and had income from more than one country, you may have to file tax returns in both countries. There are tax treaties between Austria and the UK (and most other countries), so you would have to check those treaties to find out what gets taxed where. In principle you get taxed only once, but usually you would have to declare all income. The last important thing is of course to make sure you submit before the relevant deadlines.
"(Selling apps is AFAIK business, not freelancing - unless the type of app you produce is considered a freelancing subject. The tax office will give you a questionnaire and then decide).  As Einzelunternehmer, you can receive the payments for the apps to the same account where your wages go. However, there are lots of online accounts that do not cost fees, so consider to receive them on a separate account so you have the business and private kind of separate (for small Einzelunternehmer, there is no legal separation between business and private money - you have full liability with your private money for the business).  The local chamber of commerce can tell you everything about setting up such a business, ask them (you'll probably have to become a member there anyways). They have information as well on VAT (Umsatzsteuer, USt) which you need to declare unless you get an exemption (probably possible), and about Gewerbesteuer (the income tax of the business) etc. For the tax, you have ""subforms""  for the income tax e.g. for wages and for business income, so you just submit both with the main form. You'll get an appropriate tax number when registering the business.  Social security/insurance: as long as the app selling is only a side business, the social insurance payments for your main job completely cover the side job as well. You need to make sure that your employment contract is compatible with the app business, though.  A quick search indicates that there is a tax treaty between Germany and the Ukraine, Wikipedia says there are no contracts about social insurance in effect (yet)." "As you are earning an income by working in India, you are required to pay tax in India. If you contract is of freelance, then the income earned by you has to be self declared and taxes paid accordingly. There are some expenses one can claim, a CA should be able to guide you.   Not sure why the Swiss comapny is paying taxes?. Are they depositing this with Income Tax, India, do they have a TAN Number. If yes, then you don't need to pay tax. But you need to get a statement from your company showing the tax paid on behalf of you. You can also verify the tax paid on your behalf via ""http://incometaxindia.gov.in/26ASTaxCreditStatement.asp"" you cna register. Alternatively if you have a Bank Account in India with a PAN card on their records, most Banks provide a link to directly see" "You cannot ""claim back"" VAT. What happens is that if you sell goods with VAT and charge customers VAT, you would have to send that VAT straight to HMRC, but if your business itself paid VAT, then you already paid VAT, so you have to send less.  As an example, if you send an invoice for £10,000 plus £2,000 VAT, and you paid yourself £500 VAT on business related expenses, then you need to send £2,000 - £500 = £1,500 to HMRC.  But if you don't send invoices including VAT, then you owe HMRC £0. Any VAT you paid on business related expenses is lost; HMRC won't pay you money.  BTW. Only VAT on business related expenses can be deducted. So if you want to be ""smart"", register for VAT and get the VAT on your weekly shopping bill refunded, forget it." "The Dutch tax office is pretty decent, although slightly overburdened. Don't expect a lot of help, but they're not generally known for making a lot of problems. Digital copies are fine, for instance. They will send you your first VAT notice. You probably would have known if your company would have been incorporated, so I'll assume you're just trading as a natural person. That means you still have to file VAT returns, but the business income is just filed annually as ""other income"".  For the VAT part, you'll need to invoice your customers. Keep a copy of those invoices for your own bookkeeping, and keep track of the matching customer payments. Together these form the chief evidence of your VAT obligation. You also have a VAT deduction from your purchases (it's a Value-Added Tax, after all). Again, keep receipts. The usual VAT period is 3 months, so you'd pay VAT 4 times a year. But if you would pay less than 1883 euro, you might not need to pay at all and just need to file annually The income part is easy with the receipts you had for VAT purposes anyway. Dutch Tax Office, VAT, in English" Yes, you can still file a 1040nr. You are a nonresident alien and were:  engaged in a trade or business in the United States Normally, assuming your withholding was correct, you would get a minimal amount back. Income earned in the US is definitely Effectively Connected Income and is   taxed at the graduated rates that apply to U.S. citizens and resident aliens. However, there is a tax treaty between US and India, and it suggests that you would be taxed on the entirety of the income by India. This suggests to me that you would get everything that was withheld back. It makes no difference (to the UK) what country a bank account is in.  What matters is whether you are resident in the UK or not while employed locally in a foreign country.  You're taxed on where you are tax resident (which could be either country, both, or neither), not where the money is earned or banked.  You can assume, with modern exchange of information agreements, that all money you put in bank accounts anywhere in the world will eventually be known to the UK authorities. The rules for when you are a UK tax resident changed recently, there is now a statutory test for residence (pdf).  The rules are complex, but in general if you are outside the UK for less than one full tax year you're still resident, and in many cases where you're gone longer than that you may still be, depending on the length of your trips back to the UK and the ties you have there. So a 6-month winter job in Thailand teaching English as a foreign language will be subject to UK tax if you come back after, even if you leave all the money there or in a third country. If you pay local tax as well there are agreements between countries to avoid double taxation, but these do vary.  What you do about National Insurance payments while gone for a short time is another complex area. No you won't. Germany taxes income, not bank accounts. Note that this changes immediately when your bank account makes interest - you will owe taxes on this interest. However, chances are you won't get a bank account. Without residency or income, typically the banks wouldn't give you an account. Feel free to try, though. No, you cannot. The FICA taxes paid are not refunded if you're not reaching the benefits threshold. They're gone. That is why foreigners who are not tax residents (mainly students) are not required to pay them. If your home country has a social security reciprocity agreement with the US - you can have a credit in your home country. "Finally, I got response from finance center:  ""It doesn't matter where do you study, what does matter is where you   live. So, once you live in Germany, you pay taxes in Germany. And   it doesn't matter who you work for."" So, there are two options to pay taxes: it's paid by an employer or an employee: If I would work for Swiss company, I need to show how much money I make every month (or year) to Finance Center." "I'll assume that you would work as a regular (part-time) employee. In this case, you are technically a Grenzgänger. You will need a specific kind of Swiss permit (""Grenzgängerbewilligung"") allowing you to work in Switzerland. Your employer typically takes care of this - they have more experience than you. You being non-EU might make matters a bit more complicated. Your employer will withhold 4.5% of your gross income as source taxes (""Quellensteuer""). When you do your tax declaration, your entire income will be taxed in Germany, since this is where you live. This will happen after your first year of work. Be prepared for a large tax bill (or think of this as an interest-free loan from Germany to you). However, due to the Doppelbesteuerungsabkommen (DBA), the 4.5% you already paid to Switzerland will be deducted from the taxes you are due in Germany. Judging from my experience, the tax authorities in Germany are not fluent in the DBA - particularly in areas far away from the Swiss border. I had to gently remind them to deduct the source taxes, explicitly referring to the DBA. The bill was revised without problems, but I strongly recommend making sure that your source taxes are correctly deducted from your German tax liability. Once your local German tax office understands your situation, you will be asked to make quarterly prepayments, which will be calculated in a way to minimize your later overall tax liability. Budget for these. You didn't ask, but I'll tell you anyway: social security will normally be handled by Switzerland as the country of employment - not the country of residence. Your employer will automatically deduct old age, unemployment and accident insurance and contribute to a pension plan, all in Switzerland. However... ... if you do a lot of your work in Germany (>25%), which certainly applies if you plan on mostly working remotely, your social security will be handled by your country of residence. This is a major pain for your employer, because now your Swiss employer needs to understand the German social security system, how much and to whom to co-pay and so forth. This is a major area of study, and your employer may not want to spend all this effort. My employer has looked at this and requires anyone living outside of Switzerland to limit working from home to less than 25%, because by extension, they would some day also need to do the same for employees living in France, Italy, Austria... or even the UK. They don't want to dig through half the EU states' social security regulations. Therefore, you would not be able to work remotely from Germany for my employer. This is actually a fairly recent development that only entered in force at the beginning of 2015 (before that, this was all a bit of a gray area). Your prospective employer may not be aware of all details. So you will need to think about whether you actively want to point them at this (possibly ruining your plans of working remotely), or not (and possibly getting major problems and post-payments years later). Finally, I think you can choose whether you want to have your health insurance in Switzerland or in Germany (unless your Swiss obligation to be insured is waived because of your part-time status). Some Swiss health insurers offer plans where they cooperate with German health insurers, so you can go to German doctors just like a German resident. Source: I have been a Grenzgänger from Germany into Switzerland off and on for over ten years now. I can't say anything about whether your German visa restricts you from working in Switzerland. You may want to ask about this at Expatriates.SE, but I'd much rather ask your local German authorities than random strangers on the internet." "The real question you're asking is how you can work for your business. You cannot. Whether your ""friend"" pays you or not is entirely irrelevant. Claiming your work-related earnings as interest/dividend will make it also a tax fraud, in addition to the immigration violation (i.e.: not only deportation but also potentially jail time)." &gt;OK, great, where do I apply for my refund?  An odd question, but I'll answer it if you really don't know.  Tax credits will only likely be a refund if you pay too much tax during the year, otherwise they will be reductions in your yearly tax bill.  In most countries, tax credits are awarded when paying taxes.  Assuming you are from the United States, that would likely be in April on your individual income tax form.  Tax credits can be earned for doing anything the government deems desirable or worthy of exception.  Examples include buying a first house, having children, starting or running a business, paying tuition, adopting a child,  caring for an elderly or disabled person, earning money overseas, paying certain types of medical insurance, and being married in addition to purchasing a zero emission or low emission vehicle. Companies in the US will take care of paying a portion of your required income tax on your behalf based on some paperwork you fill out when starting work.  However, it is up to you as an individual to submit an income tax return.  This is used to ensure that you did not end up under or overpaying based on what your company did on your behalf and any other circumstances that may impact your actual tax owed. In my experience, the process is similar in Europe.  I think anyone who has a family, a house or investments in Europe would need to file an income tax return as that is when things start to get complex. "Disclaimer: My answer is based on US tax law, but I assume Australian situation would be similar. The IRS would not be likely to believe your statement that ""I wouldn't have gone to the country if it wasn't for the conference.""  A two-week vacation, with a two-day conference in there, certainly looks like you threw in the conference in order to deduct vacation expenses.  At the very least, you would need a good reason why this conference is necessary to your business. If you can give that reason, it would then depend on the specifics of Australian law.  The vacation is clearly not just incidental to the trip. The registration for the conference is always claimable as a business expense." "Market cap is the current value of a company's equity and is defined as the current share price multiplied by the number of shares. Please check also ""enterprise value"" for another definition of a company`s total value (enterprise value = market cap adjusted for net nebt). Regarding the second part of your question: Issuing new shares usually does not affect market cap in a significant way because the newly issued shares often result in lower share prices and dilution of the existing share holders shares."