Behind the Filed Return: Document Reconciliation, RSU Taxation and Foreign Tax Credit at Taxblock Professional Services Private Limited

Filing an income tax return in India looks like a form-filling exercise, but for salaried people with stock compensation or foreign income it is closer to a small financial investigation. This paper draws on an eleven-week on-the-job training (25 May to 8 August 2026) at Taxblock Professional Services Pvt. Ltd., Pune, during which I handled 54 cases for 38 unique clients. I describe how the firm moves a return from onboarding to e-verification, and I look closely at three areas where mistakes are most likely: reconciling the documents a client provides against what the tax department already holds, taxing restricted stock units (RSUs), and claiming credit for tax paid abroad. The main observation is that the arithmetic was rarely the hard part. Most of the time went into finding out whether the inputs were complete and could be traced to a document. The caseload came mostly from employees of multinational technology companies and is not a sample of Indian taxpayers in general, so the findings are best read as observations from one firm.