I should open the most promising links to gather detailed information. This includes the "22 Best Tally ERP 9 Books PDF..." page, the "Learn Tally.ERP9 at Your Home!" site, the Scribd documents, the Khatabook article, the "Tally PDF Notes With GST" page, the YouTube video, and the Google Books link. search results provide a variety of resources. The "22 Best Tally ERP 9 Books PDF" page might list Bengali books. The "Learn Tally.ERP9 at Your Home!" site is a book in English. The idoc.pub PDF is in English. The Scribd document is in German. The docshare.tips document is in English. The Scribd "Practical Assignment" is in English. The Khatabook article is in Bengali but is an article, not a PDF book. The "Tally PDF Notes With GST" page has notes in Hindi and English. The YouTube video description might contain a link to PDF notes. The Google Books result is a preview.
Sites like Sanghvi Enterprise list collections of Tally books available in multiple regional languages, including Bengali. Core Topics Covered in Bengali Tally Books Tally Erp 9 Bengali Version Books Pdf LINK