Tax returns made easy
Artificial intelligence prepares your tax return in just a few steps. You can check everything in your own time and submit it directly to the Canton of Zurich tax office electronically with just one click. For CHF 49 per tax return, incl. review by qualified specialists worth CHF 89.
Do you find your tax return tedious and always have unanswered questions? You’re not alone: more than one in two people in Switzerland feel the same way. Our tool helps you to create your tax return quickly and easily, ensures you don’t miss any relevant deductions and formally submits it directly to the canton. We developed TaxOptimizer in collaboration with our Swiss partner iqtax.
Simple and intuitive onboarding guides you step by step through the process. Thanks to the automatic recognition and transfer of data from your documents and receipts, there is mostly no need to enter numbers manually. This saves you valuable time and reduces sources of error.
The tool identifies suitable deductions for your personal situation and automatically takes into account all applicable deductions, such as pillar 3a up to CHF 7,258 or your professional expenses. This will enable you to make the best use of your personal tax savings potential and ensures you don’t miss out on any deductions that you are entitled to.
The tool brings together all the important information about your tax return in one place. You can store your documents and receipts centrally and clearly or scan them directly with the iqdocs app. And if you have any questions, the tax assistant can help you in the chat. This is supported by real-life specialists.
Simple and intuitive onboarding guides you step by step through the process. Thanks to the automatic recognition and transfer of data from your documents and receipts, there is mostly no need to enter numbers manually. This saves you valuable time and reduces sources of error.
The tool identifies suitable deductions for your personal situation and automatically takes into account all applicable deductions, such as pillar 3a up to CHF 7,258 or your professional expenses. This will enable you to make the best use of your personal tax savings potential and ensures you don’t miss out on any deductions that you are entitled to.
The tool brings together all the important information about your tax return in one place. You can store your documents and receipts centrally and clearly or scan them directly with the iqdocs app. And if you have any questions, the tax assistant can help you in the chat. This is supported by real-life specialists.
Five simple steps to submit your tax return.
Answer the questions. Answer some personal questions such as age and marital status.
Enter details. Provide details on relevant assets and deductions.
Upload receipts. Upload your documents and receipts. These are read and classified automatically.
Check and submit. Check the automatically completed tax return and officially submit it to the canton directly via the tool.
View analyses. Take a look at the analyses of your financial situation and optimization options.
Pilot offer: CHF 49 per tax return, incl. examination by qualified specialists worth CHF 89.
Create a tax return with automatic reading of your receipts
Direct electronic submission to the tax office of the Canton of Zurich
Check by a certified specialist before submission, worth CHF 89
Personal tax insights after submission
Submission receipt and provisional tax calculation available for download
No problem. Enter the waiting list for 2026 and get a free review of your tax situation when your 2026 tax return is prepared by qualified tax and fiduciary specialists.
Very user-friendly tool that saves a lot of time.
We developed TaxOptimizer in collaboration with iqtax. iqtax is a Swiss technology company based in Rotkreuz (Canton of Zug) that is rethinking tax returns: AI-supported, paperless and directly connected to the tax authorities. Developed with qualified tax and fiduciary experts.
TaxOptimizer is currently in the pilot phase and is being made available to a wider range of PostFinance customers for the first time. The test phase starts on 24 August 2026 and lasts until 31 December 2026. The offer is aimed in particular at people with a simple to mid-level tax situation, such as employees with the usual income, asset and deduction positions. During the pilot phase, you can prepare and submit your tax return for CHF 49.
TaxOptimizer is based on the existing solution from our partner iqtax. For collaboration with PostFinance, this has been specifically expanded and adapted to the requirements of the pilot project.
Electronic submission is initially possible in the Canton of Zurich, with further cantons to follow in stages. If your canton is not yet participating, you can register and be notified.
The real tax return should be so easy to use.
Our partner iqtax completes your tax return and provides all tax-related information, notes and information. iqtax is your point of contact for questions relating to your tax return and tax matters. The corresponding services are provided by iqtax.
Clicking the button to start your tax return now will take you directly to the iqtax environment. The following services are provided exclusively by iqtax and are their responsibility. You can find iqtax’s current privacy policy at The link will open in a new window iqtax.ch/en/datenschutzerklarung. PostFinance will evaluate only anonymized data to determine the success of the pilot project and will not process any personal data itself.
PostFinance does not provide tax advice. Our role is to advise you on your financial needs as required, for example in the areas of retirement planning, investments, financial planning or financing. If you wish, you can arrange an appointment with our specialists directly from the tool.
TaxOptimizer is an AI-based tool for your tax return that PostFinance offers together with its Swiss partner iqtax. Instead of filling out form fields, simply upload your documents, such as your salary statement, pillar 3a certificate or health insurance premiums. Artificial intelligence reads your documents automatically, creates your tax return from them and makes possible deductions visible. You check the result and submit your tax return directly to the tax office in the Canton of Zurich electronically with just one click. In addition, a certified specialist will check your data again.
With the cantonal software, you can still complete your tax return yourself, field by field, with manual transfer of all the numbers. TaxOptimizer reverses the process:
In five simple steps:
The effort involved is much less than filling in the form manually: you answer a few questions, upload your documents and check the results. The numbers are taken from your documents automatically so you hardly have to enter anything yourself.
Yes. You can see which fields have been filled in automatically at any time and check each item before submitting it. You can adjust the values if necessary. If you are unsure, certified specialists are available to help at any time.
During the pilot phase, you can prepare and submit your tax return for CHF 49. Payment is made directly in the iqtax environment before you submit it. As part of the pilot project, you will also benefit from a free expert review worth CHF 89, i.e. the verification of your declaration by a certified specialist.
No. The price of CHF 49 covers the preparation and submission of your tax return. You have the option of booking iqtax value-added services, such as a personal consultation (expert call) or iqtax protection, where iqtax checks your tax assessment for you after submission and is entered as your tax representative. These services are voluntary and are accounted for separately and transparently.
None. Your tax return is created and processed entirely in the iqtax environment. PostFinance does not process any personal data from the tool and only analyses anonymized data to determine the success of the pilot project. The iqtax Privacy Policy applies (The link will open in a new window iqtax.ch/en/datenschutzerklarung).
For more information on security and data protection, please refer to the iqtax provisions.
Yes. Your tax return is submitted directly to the tax office in the Canton of Zurich electronically and officially via the certified interface, without printing it out or sending it by post. iqtax is one of the first private providers to offer this kind of connection.
Direct electronic submission is currently possible in the Canton of Zurich; further cantons will follow in stages. If your canton is not yet available, you can register and be notified as soon as it is available.
Yes, especially then. As your documents are read automatically, you can complete your tax return without having to spend a lot of time searching around, and in good time before your deadline.
As soon as you have submitted your tax return, you can download the submitted tax return, including the official submission receipt and provisional tax calculation for your files. TaxOptimizer then shows you what your figures reveal about your financial situation, from retirement planning to savings potential. If you wish, arrange a free consultation with PostFinance directly from the application, for example on retirement planning, investments or financing.
No, a customer relationship with PostFinance is not required. TaxOptimizer can be used by all taxpayers, regardless of which bank they are with. PostFinance is a partner of the service, not a prerequisite for its use.
The offer is aimed at people with simple to mid-level tax situations, such as employees with the usual income, asset and deduction positions.
Tax returns for sole proprietorships cannot currently be created using the tool. iqtax offers an expert tax return for this purpose: experts can take care of your declaration and advise you individually.
For a personal 1:1 consultation, you can book an expert call with a certified specialist. If you have any questions about your finances, retirement planning, investments or mortgages, PostFinance will be happy to help.
TaxOptimizer is based on the existing iqtax solution, which has been specifically expanded for collaboration with PostFinance. What’s new is that the service will be made available to a wider range of PostFinance customers for the first time. The pilot phase runs until the end of 2026 and helps us to continuously improve our range of services.
If you have any questions about your tax return or how to use it, iqtax support will be happy to help you directly within the platform (Help Center and chat). If you have any questions about your finances or PostFinance products, you can contact the PostFinance hotline as usual.
