Short answer: Since you already have an active limited company, there is no need to set up a business from scratch; you can add the e-commerce NACE code to your current business scope and apply for a virtual POS with an up-to-date signature circular tax certificate, Trade Registry Gazette, and the mandatory consumer policy texts on your website.
The first step is updating your tax office registration. Your company's primary activity codes must include the NACE code covering retail trade via mail order or internet. For this process your certified public accountant submits a single additional activity petition via the Interactive Tax Office; the tax office usually registers the code on your record within 2-3 business days without requiring an on-site inspection.
The second step is preparing the corporate document file for payment service providers: 1) Barcoded tax certificate for the most recent calendar year 2) Notarized signature circular of the authorized company representative, 3) Copies of the Trade Registry Gazette showing incorporation and latest share distribution, 4) Certificate of activity issued within the past month by your registered chamber of commerce 5) ID photocopies of the company partners and bank account passbook/statement under the company's legal entity.
The third and most critical phase that determines application approval is the legal review of your website. Payment providers inspect your pages before taking your site live. It is mandatory for the site to fully feature the Distance Sales Agreement Preliminary Information Form, Cancellation and Refund Policy, KVKK Clarification Text, and Privacy Notice. Within 30 days after sales begin, you are also legally required to complete your ETBİS (Electronic Commerce Information System) registration.