Thank you for your email. BDTax is self guided. Please complete the steps it provides you. If you escape any required field it will show you a red mark. And then just fill up that field.
After completing the tax preparation you can go to the print preview to check weather the required fields are complete or not.
Hope you understand. For any query jut send us an email on support@bdtax.com.bd. We are here for you.
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